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                                FORM 10-Q


                    SECURITIES AND EXCHANGE COMMISSION
                         WASHINGTON, D.C.  20549

(Mark One)

(X)  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
     OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 1998

                                    OR

(  ) TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
     OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ________________ to ________________

Commission file number 0-18398


         Southwest Royalties Institutional Income Fund IX-B, L.P.
                  (Exact name of registrant as specified
                  in its limited partnership agreement)

Delaware                                    75-2274633
(State or other jurisdiction of                (I.R.S. Employer
incorporation or organization)                Identification No.)


                       407 N. Big Spring, Suite 300
                           Midland, Texas 79701
                 (Address of principal executive offices)

                             (915) 686-9927
                     (Registrant's telephone number,
                           including area code)

Indicate  by  check  mark  whether registrant (1)  has  filed  all  reports
required to be filed by Section 13 or 15(d) of the Securities Exchange  Act
of 1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject  to
such filing requirements for the past 90 days:


                            Yes   X   No

        The total number of pages contained in this report is 14.


                     PART I. - FINANCIAL INFORMATION


Item 1. Financial Statements

The  unaudited  condensed financial statements included  herein  have  been
prepared  by  the Registrant (herein also referred to as the "Partnership")
in  accordance  with generally accepted accounting principles  for  interim
financial information and with the instructions to Form 10-Q and Rule 10-01
of Regulation S-X.  Accordingly, they do not include all of the information
and  footnotes  required  by generally accepted accounting  principles  for
complete   financial  statements.   In  the  opinion  of  management,   all
adjustments necessary for a fair presentation have been included and are of
a  normal  recurring nature.  The financial statements should  be  read  in
conjunction with the audited financial statements and the notes thereto for
the  year ended December 31, 1997 which are found in the Registrant's  Form
10-K  Report  for  1997 filed with the Securities and Exchange  Commission.
The December 31, 1997 balance sheet included herein has been taken from the
Registrant's  1997 Form 10-K Report.  Operating results for the  three  and
six month periods ended June 30, 1998 are not necessarily indicative of the
results that may be expected for the full year.


         Southwest Royalties Institutional Income Fund IX-B, L.P.

                              Balance Sheets


                                                 June 30,      December 31,
                                                   1998            1997
                                                ---------      ------------
                                               (unaudited)
  Assets

Current assets:
 Cash and cash equivalents                   $     64,370          29,956
 Receivable from Managing General Partner          35,462          83,386
                                                ---------       ---------
    Total current assets                           99,832         113,342
                                                ---------       ---------
Oil and gas properties - using the
 full cost method of accounting                 3,183,393       3,286,714
  Less accumulated depreciation,
   depletion and amortization                   2,519,000       2,474,000
                                                ---------       ---------
    Net oil and gas properties                    664,393         812,714
                                                ---------       ---------
                                             $    764,225         926,056
                                                =========       =========
  Liabilities and Partners' Equity

Current liability - Distributions payable    $        158             245
                                                ---------       ---------
Partners' equity:
 General partners                                (59,367)        (49,134)
 Limited partners                                 823,434         974,945
                                                ---------       ---------
    Total partners' equity                        764,067         925,811
                                                ---------       ---------
                                             $    764,225         926,056
                                                =========       =========


         Southwest Royalties Institutional Income Fund IX-B, L.P.

                         Statements of Operations
                               (unaudited)


                                 Three Months Ended      Six Months Ended
                                       June 30,              June 30,
                                    1998      1997        1998      1997

  Revenues

Income from net profits
 interests                    $    52,308     92,105     99,640    226,914
Interest                              391        297        910        680
                                   ------    -------    -------    -------
                                   52,699     92,402    100,550    227,594
                                   ------    -------    -------    -------

  Expenses

General and administrative         21,300     17,888     47,389     42,347
Depreciation, depletion and
 amortization                      24,000     18,000     45,000     38,000
                                   ------    -------    -------    -------
                                   45,300     35,888     92,389     80,347
                                   ------    -------    -------    -------
Net income                    $     7,399     56,514      8,161    147,247
                                   ======    =======    =======    =======
Net income allocated to:

 Managing General Partner     $     2,827      6,706      4,785     16,673
                                   ======    =======    =======    =======
 General Partner              $       314        745        532      1,852
                                   ======    =======    =======    =======
 Limited partners             $     4,258     49,063      2,844    128,722
                                   ======    =======    =======    =======
  Per limited partner unit    $       .44       5.02        .29      13.16
                                   ======    =======    =======    =======


         Southwest Royalties Institutional Income Fund IX-B, L.P.

                         Statements of Cash Flows
                               (unaudited)


                                                        Six Months Ended
                                                             June 30,
                                                          1998      1997

Cash flows from operating activities:

 Cash received from income from net profits
  interests                                         $   143,694    289,209
 Cash paid to suppliers                                (43,518)   (42,004)
 Interest received                                          910        680
                                                       --------    -------
  Net cash provided by operating activities             101,086    247,885
                                                       --------    -------
Cash flows provided by investing activities:

 Cash received from sale of oil and gas
  properties                                            103,320          -
                                                       --------    -------
Cash flows used in financing activities:

 Distributions to partners                            (169,992)  (257,959)
                                                       --------    -------
Net increase (decrease) in cash and cash
 equivalents                                             34,414   (10,074)

 Beginning of period                                     29,956     13,489
                                                       --------    -------
 End of period                                      $    64,370      3,415
                                                       ========    =======
                                                               (continued)


         Southwest Royalties Institutional Income Fund IX-B, L.P.

                   Statements of Cash Flows, continued
                               (unaudited)


                                                        Six Months Ended
                                                             June 30,
                                                          1998      1997

Reconciliation of net income to net cash
 provided by operating activities:

Net income                                             $    8,161   147,247

Adjustments to reconcile net income to net
 cash provided by operating activities:

  Depreciation, depletion and amortization                 45,000    38,000
  Decrease in receivables                                  44,054    62,295
  Increase in payables                                      3,871       343
                                                          -------   -------
Net cash provided by operating activities              $  101,086   247,885
                                                          =======   =======


Item 2.   Management's  Discussion and Analysis of Financial Condition  and
          Results of Operations

General

Southwest Royalties Institutional Income Fund IX-B, L.P. was organized as a
Delaware limited partnership on March 9, 1989. The offering of such limited
partnership  interests began on May 11, 1989, minimum capital  requirements
were  met  on September 26, 1989, and the offering concluded on  March  31,
1990, with total limited partner contributions of $4,891,000.

The Partnership was formed to acquire royalty and net profits interests  in
producing  oil  and  gas properties, to produce and market  crude  oil  and
natural  gas  produced  from such properties, and  to  distribute  the  net
proceeds from operations to the limited and general partners.  Net revenues
from  producing oil and gas properties are not reinvested in other  revenue
producing assets except to the extent that production facilities and  wells
are improved or reworked or where methods are employed to improve or enable
more efficient recovery of oil and gas reserves.

Increases   or   decreases   in  Partnership   revenues   and,   therefore,
distributions  to partners will depend primarily on changes in  the  prices
received  for  production,  changes in volumes of  production  sold,  lease
operating  expenses, enhanced recovery projects, offset drilling activities
pursuant  to farm-out arrangements, sales of properties, and the  depletion
of  wells.   Since  wells deplete over time, production  can  generally  be
expected to decline from year to year.

Well  operating costs and general and administrative costs usually decrease
with   production   declines;  however,  these  costs  may   not   decrease
proportionately.  Net income available for distribution to the partners  is
therefore expected to fluctuate in later years based on these factors.

Based  on  current  conditions, management does not  anticipate  performing
workovers  during the next year.  The Partnership may undergo  an  increase
1998.   Thereafter,  the  Partnership could possibly  experience  a  normal
decline of 8% to 10% per year.

Oil and Gas Properties

Oil  and  gas  properties  are accounted for at cost  under  the  full-cost
method.  Under this method, all productive and nonproductive costs incurred
in  connection with the acquisition, exploration and development of oil and
gas  reserves  are capitalized.  Gain or loss on the sale of  oil  and  gas
properties  is not recognized unless significant oil and gas  reserves  are
involved.

The  Partnership's policy for depreciation, depletion and  amortization  of
oil  and  gas  properties is computed under the units  of  revenue  method.
Under the units of revenue method, depreciation, depletion and amortization
is  computed  on  the  basis of current gross revenues from  production  in
relation  to future gross revenues, based on current prices, from estimated
production of proved oil and gas reserves.

Should the net capitalized costs exceed the estimated present value of  oil
and gas reserves, discounted at 10%, such excess costs would be charged  to
current  expense.  As of June 30, 1998, the net capitalized costs  did  not
exceed the estimated present value of oil and gas reserves.  A continuation
of the oil price environment experienced during the first half of 1998 will
have  an adverse affect on the Company's revenues and operating cash  flow.
Also,  further declines in oil prices could result in additional  decreases
in the carrying value of the Company's oil and gas properties.




Results of Operations

A.  General Comparison of the Quarters Ended June 30, 1998 and 1997

The  following  table  provides certain information  regarding  performance
factors for the quarters ended June 30, 1998 and 1997:

                                               Three Months
                                                  Ended          Percentage
                                                 June 30,         Increase
                                              1998       1997    (Decrease)
                                              ----       ----    ----------

Average price per barrel of oil          $    12.53     18.69     (33%)
Average price per mcf of gas             $     1.75      1.80      (3%)
Oil production in barrels                     8,300     7,500       11%
Gas production in mcf                        33,700    46,300     (27%)
Income from net profits interests        $   52,308    92,105     (43%)
Partnership distributions                $   72,904    75,000      (3%)
Limited partner distributions            $   67,054    67,500      (1%)
Per unit distribution to limited
 partners                                $     6.85      6.90      (1%)
Number of limited partner units               9,782     9,782

Revenues

The  Partnership's income from net profits interests decreased  to  $52,308
from $92,105 for the quarters ended June 30, 1998 and 1997, respectively, a
decrease  of  43%.  The principal factors affecting the comparison  of  the
quarters ended June 30, 1998 and 1997 are as follows:

1.  The  average  price  for a barrel of oil received  by  the  Partnership
    decreased  during the quarter ended June 30, 1998 as  compared  to  the
    quarter ended June 30, 1997 by 33%, or $6.16 per barrel, resulting in a
    decrease of approximately $46,200 in income from net profits interests.
    Oil sales represented 64% of total oil and gas sales during the quarter
    ended  June  30, 1998 as compared to 63% during the quarter ended  June
    30, 1997.

    The  average  price  for  an  mcf of gas received  by  the  Partnership
    decreased during the same period by 3%, or $.05 per mcf, resulting in a
    decrease of approximately $2,315 in income from net profits interests.

    The  total  decrease in income from net profits interests  due  to  the
    change  in prices received from oil and gas production is approximately
    $48,515.   The market price for oil and gas has been extremely volatile
    over  the  past  decade, and management expects  a  certain  amount  of
    volatility to continue in the foreseeable future.


2.  Oil  production increased approximately 800 barrels or 11%  during  the
    quarter  ended June 30, 1998 as compared to the quarter ended June  30,
    1997, resulting in an increase of approximately $10,024 in income  from
    net profits interests.

    Gas  production  decreased approximately 12,600 mcf or 27%  during  the
    same period, resulting in a decrease of approximately $22,050 in income
    from net profits interests.

    The  net total decrease in income from net profits interests due to the
    change  in  production is approximately $12,026.  The decrease  in  gas
    production  is due primarily to a farm-out agreement on one well  which
    decreased  the  partnerships ownership percentage and  one  well  which
    experienced  downtime in the second quarter of 1997 and  then  a  sharp
    decline in production.

3.  Lease  operating  costs  and  production  taxes  were  16%  lower,   or
    approximately $20,472 less during the quarter ended June  30,  1998  as
    compared to the quarter ended June 30, 1997.  The decrease is primarily
    attributable  to  workovers performed on two wells during  the  quarter
    ended June 30, 1997.

Costs and Expenses

Total costs and expenses increased to $45,300 from $35,888 for the quarters
ended  June  30,  1998  and 1997, respectively, an increase  of  26%.   The
increase  is  a  result  of  higher  depletion  expense  and  general   and
administrative expense.

1.  General and administrative costs consists of independent accounting and
    engineering  fees,  computer services, postage,  and  Managing  General
    Partner  personnel costs.  General and administrative  costs  increased
    19%  or approximately $3,412 during the quarter ended June 30, 1998  as
    compared  to the quarter ended June 30, 1997.  Increase in general  and
    administrative costs are the result of higher accounting  fees  due  to
    the  necessity of contracting out preparation of tax depletion and  K-1
    schedules.

2.  Depletion expense increased to $24,000 for the quarter ended  June  30,
    1998  from  $18,000  for the same period in 1997.  This  represents  an
    increase  of 33%.  Depletion is calculated using the units  of  revenue
    method  of  amortization based on a percentage of current period  gross
    revenues  to  total future gross oil and gas revenues, as estimated  by
    the  Partnership's  independent  petroleum  consultants.   Contributing
    factors  to  the increase in depletion expense between the  comparative
    periods  were  the decrease in the price of oil used to  determine  the
    Partnership's reserves for January 1, 1998 as compared to 1997 and  the
    decline in oil and gas revenue.


B.   General  Comparison of the Six Month Periods Ended June 30,  1998  and
1997

The  following  table  provides certain information  regarding  performance
factors for the six month periods ended June 30, 1998 and 1997:

                                                Six Months
                                                  Ended          Percentage
                                                 June 30,         Increase
                                              1998       1997    (Decrease)
                                              ----       ----    ----------

Average price per barrel of oil          $   13.26     18.83       (30%)
Average price per mcf of gas             $    1.60      1.91       (16%)
Oil production in barrels                   15,000    15,400        (3%)
Gas production in mcf                       74,000   100,000       (26%)
Income from net profits interests        $  99,640   226,914       (56%)
Partnership distributions                $ 169,904   258,000       (34%)
Limited partner distributions            $ 154,354   232,200       (34%)
Per unit distribution to limited
 partners                                $   15.78     23.74       (34%)
Number of limited partner units              9,782     9,782

Revenues

The  Partnership's income from net profits interests decreased  to  $99,640
from   $226,914  for  the  six  months  ended  June  30,  1998  and   1997,
respectively,  a  decrease  of 56%.  The principal  factors  affecting  the
comparison of the six months ended June 30, 1998 and 1997 are as follows:

1.  The  average  price  for a barrel of oil received  by  the  Partnership
    decreased during the six months ended June 30, 1998 as compared to  the
    six  months ended June 30, 1997 by 30%, or $5.57 per barrel,  resulting
    in  a  decrease  of  approximately $85,778 in income from  net  profits
    interests.  Oil sales represented 63% of total oil and gas sales during
    the  six  months ended June 30, 1998 as compared to 60% during the  six
    months ended June 30, 1997.

    The  average  price  for  an  mcf of gas received  by  the  Partnership
    decreased during the same period by 16%, or $.31 per mcf, resulting  in
    a  decrease  of  approximately  $31,000  in  income  from  net  profits
    interests.

    The  total  decrease in income from net profits interests  due  to  the
    change  in prices received from oil and gas production is approximately
    $116,778.  The market price for oil and gas has been extremely volatile
    over  the  past  decade, and management expects  a  certain  amount  of
    volatility to continue in the foreseeable future.


2.  Oil production decreased approximately 400 barrels or 3% during the six
    months ended June 30, 1998 as compared to the six months ended June 30,
    1997,  resulting in a decrease of approximately $5,304 in  income  from
    net profits interests.

    Gas  production  decreased approximately 26,000 mcf or 26%  during  the
    same period, resulting in a decrease of approximately $41,600 in income
    from net profits interests.

    The  total  decrease in income from net profits interests  due  to  the
    change  in  production is approximately $46,904.  The decrease  in  gas
    production  is due primarily to a farm-out agreement on one well  which
    decreased  the  partnerships ownership percentage and  one  well  which
    experienced  downtime in the second quarter of 1997 and  then  a  sharp
    decline in production.

3.  Lease  operating  costs  and  production  taxes  were  15%  lower,   or
    approximately $36,900 less during the six months ended June 30, 1998 as
    compared to the six months ended June 30, 1997.

Costs and Expenses

Total  costs  and expenses increased to $92,389 from $80,347  for  the  six
months ended June 30, 1998 and 1997, respectively, an increase of 15%.  The
increase  is  the result of higher general and administrative  expense  and
depletion expense.

1.  General and administrative costs consists of independent accounting and
    engineering  fees,  computer services, postage,  and  Managing  General
    Partner  personnel costs.  General and administrative  costs  increased
    12%  or approximately $5,042 during the six months ended June 30,  1998
    as compared to the six months ended June 30, 1997.  Increase in general
    and  administrative costs are the result of higher accounting fees  due
    to the necessity of contracting out preparation of tax depletion and K-
    1 schedules.

2.  Depletion  expense increased to $45,000 for the six months  ended  June
    30, 1998 from $38,000 for the same period in 1997.  This represents  an
    increase  of 18%.  Depletion is calculated using the units  of  revenue
    method  of  amortization based on a percentage of current period  gross
    revenues  to  total future gross oil and gas revenues, as estimated  by
    the  Partnership's independent petroleum consultants.   A  contributing
    factor  to  the  increase in depletion expense between the  comparative
    periods  was  the  decrease in the price of oil used to  determine  the
    Partnership's reserves for January 1, 1998 as compared to 1997.


Liquidity and Capital Resources

The  primary source of cash is from operations, the receipt of income  from
interests in oil and gas properties.  The Partnership knows of no  material
change, nor does it anticipate any such change.

Cash flows provided by operating activities were approximately $101,100  in
the six months ended June 30, 1998 as compared to approximately $247,900 in
the  six  months ended June 30, 1997.  The primary source of the 1998  cash
flow from operating activities was profitable operations.

Cash  flow provided by investing activities were approximately $103,300  in
the  six months ended June 30, 1998.  There were no cash flows provided  by
investing  activities in the six months ended June 30, 1997.   The  primary
source of the 1998 cash flow from investing activities was the sale of  oil
and gas properties.

Cash flows used in financing activities were approximately $170,000 in  the
six months ended June 30, 1998 as compared to approximately $258,000 in the
six  months ended June 30, 1997.  The only use in financing activities  was
the distributions to partners.

Total distributions during the six months ended June 30, 1998 were $169,904
of  which  $154,354 was distributed to the limited partners and $15,550  to
the general partners.  The per unit distribution to limited partners during
the  six months ended June 30, 1998 was $15.78.  Total distributions during
the  six  months  ended June 30, 1997 were $258,000 of which  $232,200  was
distributed  to  the limited partners and $25,800 to the general  partners.
The  per unit distribution to limited partners during the six months  ended
June 30, 1997 was $23.74.

The  sources  for  the  1998 distributions of $169,904  were  oil  and  gas
operations of approximately $101,100 and the sale of oil and gas properties
of  approximately  $103,300, resulting in excess cash for contingencies  or
subsequent  distributions.   The  source  for  the  1997  distributions  of
$258,000  was  oil and gas operations of approximately $247,900,  with  the
balance from available cash on hand at the beginning of the period.

Since  inception of the Partnership, cumulative monthly cash  distributions
of  $5,461,610  have  been made to the partners.   As  of  June  30,  1998,
$4,954,116 or $506.45 per limited partner unit has been distributed to  the
limited partners, representing a 101% return of the capital contributed.

As  of  June 30, 1998, the Partnership had approximately $99,674 in working
capital.   The  Managing  General Partner knows of no  unusual  contractual
commitments  and  believes  the  revenues  generated  from  operations  are
adequate to meet the needs of the Partnership.

Information Systems for the Year 2000

The  Managing  General Partner provides all data processing  needs  of  the
Partnership.   The Managing General Partner has reviewed and evaluated  its
information  systems  to determine if its systems accurately  process  data
referencing   the   year   2000.   Primarily  all   necessary   programming
modifications  to  correct year 2000 referencing in  the  Managing  General
Partners  internal accounting and operating systems have been made to-date.
However  the  Managing General Partner has not completed its evaluation  of
its vendors and suppliers systems to determine the effect, if any, the non-
compliance  of  such systems would have on the operation  of  the  Managing
General Partnership or the operations of the Partnership.



                       PART II. - OTHER INFORMATION


Item 1.   Legal Proceedings

          None

Item 2.   Changes in Securities

          None

Item 3.   Defaults Upon Senior Securities

          None

Item 4.   Submission of Matter to a Vote of Security Holders

          None

Item 5.   Other Information

          None

Item 6.   Exhibits and Reports on Form 8-K

          (a)  Exhibits:

               27 Financial Data Schedule

          (b)  Reports on Form 8-K:

                          No  reports  on  Form 8-K were filed  during  the
               quarter ended June 30, 1998.

                                SIGNATURES


Pursuant  to the requirements of the Securities Exchange Act of  1934,  the
registrant  has duly caused this report to be signed on its behalf  by  the
undersigned thereunto duly authorized.

                                 SOUTHWEST ROYALTIES INSTITUTIONAL
                                 INCOME FUND IX-B, L.P.
                                 a Delaware limited partnership


                                 By:   Southwest Royalties, Inc.
                                       Managing General Partner


                                 By:   /s/ Bill E. Coggin
                                       Bill E. Coggin, Vice
                                       President
                                       and Chief Financial Officer

Date: August 15, 1998