Exhibit 99.1

                                 LETTER OF TRANSMITTAL
                                           
                                  Offer to Exchange
                                           
                            8 1/8% Exchange Notes due 2004
                   for Any and All Outstanding 8 1/8% Notes due 2004
                            8 3/8% Exchange Notes due 2007 
                   for Any and All Outstanding 8 3/8% Notes due 2007
                            8 7/8% Exchange Notes due 2017
                   for Any and All Outstanding 8 7/8% Notes due 2017
                            8 1/2% Exchange Notes due 2027
                   for Any and All Outstanding 8 1/2% Notes due 2027
                                           
                                          of
                                           
                          Comcast Cable Communications, Inc.
                                           
                     THE EXCHANGE OFFER WILL EXPIRE AT 5:00P.M.,
                    NEW YORK CITY TIME ON [EXPIRATION DATE], 1997
                               (THE "EXPIRATION DATE")
                UNLESS EXTENDED BY COMCAST CABLE COMMUNICATIONS, INC.
                                           
                                   EXCHANGE AGENT:
                                           
                            BANK OF MONTREAL TRUST COMPANY
                                           
                                By Mail, by Overnight
                                  Courier or by Hand
                                           
                     By Hand:                     By Mail or Overnight Courier: 
          Bank of Montreal Trust Company         Bank of Montreal Trust Company
                  77 Water Street,                 77 Water Street, 4th Floor
                  5th Floor Window                   Attn: Amy Roberts
                  New York, NY 10005              Corporate Trust Department
                                                     New York, NY 10005

                                    By Facsimile:
                                    (212) 701-7684
                                           
                                Confirm by Telephone:
                                    (212) 701-7650
                                           
    Delivery of this Letter of Transmittal to an address other than as set
forth above or transmission of Instructions via a facsimile transmission to a
number other than as set forth above will not constitute a valid delivery.

    The undersigned acknowledges receipt of the Prospectus dated [DATE], 1997
(the "Prospectus") of Comcast Cable Communications, Inc. (the "Company") which,
together with this Letter of Transmittal (the "Letter of Transmittal"),
describes the Company's offer (the "Exchange Offer") to exchange $1,000 in
principal amount of 



a new series of 8 1/8% Exchange Notes due 2004 (the "New Seven-Year Notes") 
for each $1,000 in principal amount of outstanding 8 1/8% Notes due 2004 (the 
"Old Seven-Year Notes"); $1,000 in principal amount of a new series of 8 3/8% 
Exchange Notes due 2007 (the "New Ten-Year Notes") for each $1,000 in 
principal amount of outstanding 8 3/8% Notes due 2007 (the "Old Ten-Year 
Notes"); $1,000 in principal amount of a new series of 8 7/8% Exchange Notes 
due 2017 (the "New Twenty-Year Notes") for each $1,000 in principal amount of 
outstanding 8 7/8% Notes due 2017 (the "Old Twenty-Year Notes") and $1,000 in 
principal amount of a new series of 8 1/2% Exchange Notes due 2027 (the "New 
Thirty-Year Notes" and, together with the New Seven-Year Notes, the New 
Ten-Year Notes and the New Twenty-Year Notes, the "New Notes") for each 
$1,000 in principal amount of outstanding 8 1/2% Notes due 2027 (the "Old 
Thirty-Year Notes" and, together with the Old Seven-Year Notes, the Old 
Ten-Year Notes and the Old Twenty-Year Notes, the "Old Notes"). 

    The terms of the New Notes are identical in all material respects
(including principal amount, interest rate and maturity) to the terms of the Old
Notes for which they may be exchanged pursuant to the Exchange Offer, except
that the offering of the New Notes will have been registered under the
Securities Act of 1933, as amended, and, therefore, the New Notes will not bear
legends restricting the transfer thereof.

    The undersigned has checked the appropriate boxes below and signed this
Letter of Transmittal to indicate the action the undersigned desires to take
with respect to the Exchange Offer.

    PLEASE READ THE ENTIRE LETTER OF TRANSMITTAL AND THE PROSPECTUS CAREFULLY
BEFORE CHECKING ANY BOX BELOW. 

    THE INSTRUCTIONS INCLUDED WITH THIS LETTER OF TRANSMITTAL MUST BE FOLLOWED. 
QUESTIONS AND REQUESTS FOR ASSISTANCE OR FOR ADDITIONAL COPIES OF THE PROSPECTUS
AND THIS LETTER OR TRANSMITTAL MAY BE DIRECTED TO THE EXCHANGE AGENT.

    List below the Old Notes to which this Letter of Transmittal relates.  If
the space provided below is inadequate, the Certificate Numbers and Principal
Amounts should be listed on a separate signed schedule affixed hereto. 

                                       2



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                 DESCRIPTION OF OLD NOTES TENDERED HEREWITH
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Name(s) and Address(es)    Series of   Certificate    Aggregate       Principal
of Registered Holder(s)    Note(s)     Number(s)*     Principal       Amount 
(Please fill in)                                      Amount          Tendered**
                                                      Represented
                                                      by Notes*
                           ---------------------------------------------------

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                           Total
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 *Need not be completed by book-entry holders.
**Unless otherwise indicated, the holder will be deemed to have tendered the 
full aggregate principal amount represented by Old Notes.  See Instruction 2.
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                                       3


 
    This Letter of Transmittal is to be used either if certificates for Old
Notes are to be forwarded herewith or if delivery of Old Notes is to be made by
book-entry transfer to an account maintained by the Exchange Agent at The
Depository Trust Company ("DTC"), pursuant to the procedures set forth in "The
Exchange Offer -- Book-Entry Transfer" in the Prospectus.  Delivery of documents
to a book-entry transfer facility does not constitute delivery to the Exchange
Agent.

    Unless the context requires otherwise, the term "Holder" for purposes of
this Letter of Transmittal means any person in whose name Old Notes are
registered on the books of the Company or any other person who has obtained a
properly completed bond power from the registered holder or any person whose Old
Notes are held of record by DTC who desires to deliver such Old Notes by
book-entry transfer at DTC.

    Holders whose Old Notes are not immediately available or who cannot deliver
their Old Notes and all other documents required hereby to the Exchange Agent on
or prior to the Expiration Date may tender their Old Notes according to the
guaranteed delivery procedure set forth in the Prospectus under the caption "The
Exchange Offer -- Guaranteed Delivery Procedures."

/    /   CHECK HERE IF TENDERED OLD NOTES ARE BEING DELIVERED BY BOOK-ENTRY
         TRANSFER MADE TO AN ACCOUNT MAINTAINED BY THE EXCHANGE AGENT WITH THE
         DEPOSITORY TRUST COMPANY AND COMPLETE THE FOLLOWING:

         Name of Tendering Institution________________________________________

         _____________________________________________________________________

         The Depository Trust Company

         Account Number_______________________________________________________

         Transaction Code Number______________________________________________

/    /   CHECK HERE IF TENDERED OLD NOTES ARE BEING DELIVERED PURSUANT TO A
         NOTICE OF GUARANTEED DELIVERY AND COMPLETE THE FOLLOWING:

         Name of Registered Holder(s)_________________________________________

         _____________________________________________________________________

         Name of Eligible Institution that Guaranteed Delivery

         _____________________________________________________________________

                                       4


         If Deivered by Book-Entry Transfer:

         Account Number_______________________________________________________

/    /   CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10
         ADDITIONAL COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR
         SUPPLEMENTS THERETO.

         Nme:_________________________________________________________________

         Address:_____________________________________________________________

         _____________________________________________________________________

                                       5


             PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY

Ladies and Gentlemen:

    Upon the terms and subject to the conditions of the Exchange Offer, the
undersigned hereby tenders to the Company the above-described principal amount
of Old Notes.  Subject to, and effective upon, the acceptance for exchange of
the Old Notes tendered herewith, the undersigned hereby exchanges, assigns and
transfers to, or upon the order or, the Company all right, title and interest in
and to such Old Notes.  The undersigned hereby irrevocably constitutes and
appoints the Exchange Agent as the true and lawful agent and attorney-in-fact of
the undersigned (with full knowledge that said Exchange Agent acts as the agent
of the undersigned in connection with the Exchange Offer) to cause the Old Notes
to be assigned, transferred and exchanged.  The undersigned represents and
warrants that it has full power and authority to tender, exchange, assign and
transfer the Old Notes and to acquire New Notes issuable upon the exchange of
such tendered Old Notes, and that, when the same are accepted for exchange, the
Company will acquire good and unencumbered title to the tendered Old Notes, free
and clear of all liens, restrictions, charges and encumbrances and not subject
to any adverse claim.  The undersigned also warrants that it will, upon request,
execute and deliver any additional documents deemed by the Exchange Agent or the
Company to be necessary or desirable to complete the exchange, assignment and
transfer of tendered Old Notes or transfer ownership of such Old Notes on the
account books maintained by the Depository Trust Company.

    The Exchange Offer is subject to certain conditions as set forth in the
Prospectus under the caption "The Exchange Offer."  The undersigned recognizes
that as a result of these conditions (which may be waived, in whole or in part,
by the Company), as more particularly set forth in the Prospectus, the Company
may not be required to exchange any of the Old Notes tendered hereby and, in
such event, the Old Notes not exchanged will be returned to the undersigned at
the address shown below the signature of the undersigned.

    By tendering, each holder of Old Notes represents to the Company that (i)
the New Notes acquired pursuant to the Exchange Offer are being acquired in the
ordinary course of business of the person receiving such New Notes, whether or
not such person is the holder, (ii) neither the holder of Old Notes nor any such
other person has an arrangement or understanding with any person to participate
in the distribution of such New Notes, (iii) if the holder is not a
broker-dealer, or is a broker-dealer but will not receive new Notes for its own
account in exchange for Old Notes, neither the holder nor any such other person
is engaged in or intends to participate in a distribution of the New Notes and
(iv) neither the holder nor any such other person is an "affiliate", as defined
in  Rule 405 under the Securities Act of 1933, as amended (the "Act"), of the
Company.  If the tendering holder is a broker-dealer (whether or not it is also
an "affiliate") that will receive New Notes for its own account in exchange for
Old Notes, it represents that the Old Notes to be exchanged for the New Notes
were acquired by it as a result of market-making activities or other trading
activities, and acknowledges that it will deliver a prospectus meeting the
requirements of the Securities Act in connection with any resale 

                                       6


of such New Notes.  By acknowledging that it will deliver and by delivering a 
prospectus meeting the requirements of the Securities Act in connection with 
any resale of such New Notes, the undersigned is not deemed to admit that it 
is an "underwriter" within the meaning of the Securities Act.

    All authority herein conferred or agreed to be conferred shall survive the
death, bankruptcy or incapacity of the undersigned and every obligation of the
undersigned hereunder shall be binding upon the heirs, personal representatives,
successors and assigns of the undersigned.  Tendered Old Notes may be withdrawn
at any time prior to the Expiration Date.

    Certificates for all New Notes delivered in exchange for tendered Old Notes
and any Old Notes delivered herewith but not exchanged, in each case registered
in the name of the undersigned, shall be delivered to the undersigned at the
address shown below the signature of the undersigned. 

                                       7

                            TENDERING HOLDER(S) SIGN HERE

______________________________________________________________________________

______________________________________________________________________________
                              Signature(s) of Holder(s)

Dated: _________________________________, 199_

(Must be signed by registered holder(s) exactly as name(s) appear(s) on
certificate(s) for Old Notes or by any person(s) authorized to become registered
holder(s) by endorsements and documents transmitted herewith or, if the Old
Notes are held of record by DTC, the person in whose name such Old Notes are
registered on the books of DTC.  If signature by a trustee, executor,
administrator, guardian, attorney-in-fact, officer of a corporation or other
person acting in a fiduciary or representative capacity, please set forth the
full title of such person.)  See Instruction 3.

Name(s):______________________________________________________________________

______________________________________________________________________________
                                    (Please Print)
Capacity (full title):________________________________________________________

Address:______________________________________________________________________

______________________________________________________________________________
                                 (Including Zip Code)

Area Code and Telephone No.___________________________________________________

______________________________________________________________________________
                                Tax Identification No.

                              GUARANTEE OF SIGNATURE(S)
                           (If Required--See Instruction 3)

Authorized Signature:_________________________________________________________

Name:_________________________________________________________________________

Title:________________________________________________________________________

Address:______________________________________________________________________

Name of Firm:_________________________________________________________________

Area Code and Telephone No.___________________________________________________


Dated:_________________, 199_

                                       8


                                     INSTRUCTIONS

                      Forming Part of the Terms and Conditions 
                                of the Exchange Offer
                                           
    1    Delivery of this Letter of Transmittal and Certificates.  
Certificates for all physically delivered Old Notes or confirmation of any 
book-entry transfer to the Exchange Agent's account at The Depository Trust 
Company of Old Notes tendered by book-entry transfer, as well as a properly 
completed and duly executed copy of this Letter of Transmittal or facsimile 
thereof, and any other documents required by this Letter of Transmittal, must 
be received by the Exchange Agent at any of its addresses set forth herein on 
or prior to the Expiration Date.

    The method of delivery of this Letter of Transmittal, the Old Notes and any
other required documents is at the election and risk of the holder and, except
as otherwise provided below, the delivery will be deemed made only when actually
received by the Exchange Agent.  If such delivery is by mail, it is suggested
that registered mail with return receipt requested, properly insured, be used.

    Holders whose Old Notes are not immediately available or who cannot deliver
their Old Notes and all other required documents to the Exchange Agent on or
prior to the Expiration Date or comply with book-entry transfer procedures on a
timely basis may tender their Old Notes pursuant to the guaranteed delivery
procedure set forth in the Prospectus under "The Exchange Offer -- Guaranteed
Delivery Procedures."  Pursuant to such procedure:(i) such tender must be made
by or through an Eligible Institution (as defined therein);(ii) on or prior to
the Expiration Date the Exchange Agent must have received from such Eligible
Institution, a letter, telegram or facsimile transmission setting forth the name
and address of the tendering holder, the names in which such Old Notes are
registered, and, if possible, the certificate numbers of the Old Notes to be
tendered; and (iii) all tendered Old Notes (or a confirmation of any book-entry
transfer of such Old Notes into the Exchange Agent's account at The Depository
Trust Company) as well as this Letter of Transmittal and all other documents
required by this Letter of Transmittal must be received by the Exchange Agent
within five New York Stock Exchange trading days after the date of execution of
such letter, telegram or facsimile transmission, all as provided in the
Prospectus under the caption "The Exchange Offer -- Guaranteed Delivery
Procedures."

    No alternative, conditional, irregular or contingent tenders will be
accepted.  All tendering holders, by execution of this Letter of Transmittal (or
facsimile thereof), shall waive any right to receive notice of the acceptance of
the Old Notes for exchange.

    2    Partial Tenders; Withdrawals.  Tenders of Old Notes will be accepted
in all denominations of $1,000 and integral multiples in excess thereof.  If
less than the entire principal amount of Old Notes evidenced by a submitted
certificate is tendered, the tendering holder must fill in the principal amount
tendered in the box entitled "Principal Amount Tendered."  A newly issued
certificate for the principal amount of Old Notes submitted but not tendered
will be sent to such holder as soon as practicable after the 

                                       9


Expiration Date. All Old Notes delivered to the Exchange Agent will be deemed 
to have been tendered unless otherwise indicated.

    Tenders of Old Notes pursuant to the Exchange Offer are irrevocable, except
that Old Notes tendered pursuant to the Exchange Offer may be withdrawn at any
time prior to the Expiration Date.  To be effective, a written, telegraphic or
facsimile transmission notice of withdrawal must be timely received by the
Exchange Agent.  Any such notice of withdrawal must specify the person named in
the Letter of Transmittal as having tendered Old Notes to be withdrawn, the
certificate numbers of the Old Notes to be withdrawn, the principal amount of
Old Notes delivered for exchange, a statement that such a holder is withdrawing
its election to have such Old Notes exchanged, and the name of the registered
holder of such Old Notes, and must be signed by the holder in the same manner as
the original signature on the Letter of Transmittal (including any required
signature guarantees) or be accompanied by evidence satisfactory to the Company
that the person withdrawing the tender has succeeded to the beneficial ownership
of the Old Notes being withdrawn.  The Exchange Agent will return the properly
withdrawn Old Notes promptly following receipt of notice of withdrawal.  If Old
Notes have been tendered pursuant to the procedure for book-entry transfer, any
notice of withdrawal must specify the name and number of the account at The
Depository Trust Company to be credited with the withdrawn Old Notes or
otherwise comply with The Depository Trust Company's procedures.

    3    Signature on this Letter of Transmittal; Written Instruments and
Endorsements; Guarantee of Signatures.  If this Letter of Transmittal is signed
by the registered holder(s) of the Old Notes tendered hereby, the signature must
correspond with the name(s) as written on the face of certificates without
alteration, enlargement or any change whatsoever.

    If any of the Old Notes tendered hereby are owned of record by two or more
joint owners, all such owners must sign this Letter of Transmittal.

    If a number of Old Notes registered in different names are tendered, it
will be necessary to complete, sign and submit as many separate copies of this
Letter of Transmittal as there are different registrations of Old Notes.

    When this Letter of Transmittal is signed by the registered holder or 
holders of Old Notes listed and tendered hereby, no endorsements of 
certificates or separate written instruments of transfer or exchange are 
required.

    If this Letter of Transmittal is signed by a person other than the
registered holder or holders of the Old Notes listed, such Notes must be
endorsed or accompanied by separate written instruments of transfer or exchange
in form satisfactory to the Company and duly executed by the registered holder,
in either case signed exactly as the name or names of the registered holder or
holders appear(s) on the Old Notes.

    If this Letter of Transmittal, any certificates or separate written
instruments of transfer or exchange are signed by trustees, executors,
administrators, guardians, attorneys-in-fact, officers of corporations or others
acting in a fiduciary or representative

                                      10



capacity, such persons should so indicate when signing, and, unless waived by 
the Company, proper evidence satisfactory to the Company of their authority 
so to act must be submitted.

    Endorsements on certificates or signatures on separate written instruments
of transfer or exchange required by this Instruction 3 must be guaranteed by an
Eligible Institution.

    Signatures on this Letter of Transmittal need not be guaranteed by an
Eligible Institution, provided the Old Notes are tendered: (i) by a registered
holder of such Old Notes and the certificates for New Notes to be issued in
exchange therefor are to be issued (or any untendered amount of Old Notes are to
be reissued) to the registered holder; or (ii) for the account of any Eligible
Institution.

    4    Transfer Taxes.  The Company shall pay all transfer taxes, if any,
applicable to the transfer and exchange of Old Notes to it or its order pursuant
to the Exchange Offer.  If, however, New Notes are to be delivered to, or are to
be registered or issued in the name of, any person other than the registered
holder of the Old Notes tendered hereby, or if a transfer tax is imposed for any
reason other than the transfer of Old Notes to the Company or its order pursuant
to the Exchange Offer, the amount of any such transfer taxes (whether imposed on
the registered holder or any other person) will be payable by the tendering
holder.  If satisfactory evidence of payment of such taxes or exception
therefrom is not submitted herewith the amount of such transfer taxes will be
billed directly to such tendering holder.

    Except as provided in this Instruction 4, it will not be necessary for
transfer tax stamps to be affixed to the Old Notes listed in this Letter of
Transmittal.

    5    Waiver of Conditions.  The Company reserves the absolute right to
waive, in whole or in part, any of the conditions to the Exchange Offer set
forth in the Prospectus.

    6    Mutilated, Lost, Stolen or Destroyed Notes.  Any holder whose Old
Notes have been mutilated, lost, stolen or destroyed should contact the Exchange
Agent at the address indicated below for further instructions.

    7    Requests for Assistance or Additional Copies.  Questions relating to
the procedure for tendering, as well as requests for additional copies of the
Prospectus and this Letter of Transmittal, may be directed to the Exchange Agent
at the address and telephone number set forth below.  In addition, all questions
relating to the Exchange Offer, as well as requests for assistance or additional
copies of the Prospectus and this Letter of Transmittal, may be directed to the
Company at 1500 Market Street, Philadelphia, Pennsylvania 19102-2148, 
Attention: Secretary, (215) 665-1700.

    8    Irregularities.  All questions as to the validity, form, eligibility
(including time of receipt), and acceptance of Letters of Transmittal or Old
Notes will be resolved by the Company, whose determination will be final and
binding.  The Company reserves the absolute right to reject any or all Letters
of Transmittal or tenders that are not in 

                                      11



proper form or the acceptance of which would, in the opinion of the Company's 
counsel, be unlawful.  The Company also reserves the right to waive any 
irregularities or conditions of tender as to the particular Old Notes covered 
by any Letter of Transmittal or tendered pursuant to such letter.  None of 
the Company, the Exchange Agent or any other person will be under any duty to 
give notification of any defects or irregularities in tenders or incur any 
liability for failure to give any such notification.  The Company's 
interpretation of the terms and conditions of the Exchange Offer shall be 
final and binding.

    9    Definitions.  Capitalized terms used in this Letter of Transmittal and
not otherwise defined have the meanings given in the Prospectus.

    IMPORTANT: This Letter of Transmittal or a facsimile thereof (together with
certificates for Old Notes or confirmation of book-entry transfer and all other
required documents) or a Notice of Guaranteed Delivery must be received by the
Exchange Agent on or prior to the Expiration Date.

                                      12