[Janus Letterhead]



March 26, 2007

VIA EDGAR
---------

Mr. Larry Greene
Division of Investment Management
U.S. Securities and Exchange Commission
100 F Street, N.E.
Washington, D.C. 20549-0505

Re:  JANUS ADVISER SERIES (the "Registrant")
     1933 Act File No. 333-33978
     1940 Act File No. 811-09885
     Post-Effective Amendment No. 36

Dear Mr. Greene:

This letter amends the Correspondence filing dated March 2, 2007 in response to
your comments made by telephone on Thursday, January 18, 2007 and Wednesday,
February 21, 2006 with respect to Janus Adviser Series Post-Effective Amendment
No. 36. Responses to your comments are filed in their entirety below with
amendments made by this correspondence only to Comments 15 and 21. On behalf of
the Registrant, responses to your comments are as follows:

Select Shares Prospectus:

1.   COMMENT: The Staff requested that the Registrant reflect in writing all
     comments and responses and carry over comments, as applicable, to the other
     Janus Adviser Series prospectuses and Statements of Additional Information
     ("SAIs").

     RESPONSE: The Registrant acknowledges the comment and confirms that it has
     complied.

2.   COMMENT: The Staff inquired as to the Registrant's compliance with
     designation of an officer of the Funds to supervise anti-money laundering
     as required under the USA Patriot Act. The Staff also requested that
     Patriot Act disclosure be included in the Funds' Prospectuses.

     RESPONSE: The Trustees of the Registrant have designated an officer of the
     Funds to supervise its anti-money laundering program, as required under the
     USA Patriot Act. The Trustees have also approved a vendor for purposes of
     implementing requirements for customer identification. In addition, as
     discussed during our call, information regarding





     the USA Patriot Act, which is not required in the prospectus or SAI, is
     addressed in the Funds' account application materials, as well as new
     account supplemental materials.

3.   COMMENT: The Staff indicated that the cover page and certain other
     disclosure contained in the prospectus appeared in all capital letters and
     requested a different form of presentation.

     RESPONSE: As discussed during the call, the disclosure referenced appears
     in bold face type within the prospectus, not all capital letters. The EDGAR
     process converts bold face type into all capital letters.

4.   COMMENT: The Staff asked for additional background related to the money
     market reorganization and establishment of the various classes of the
     Funds.

     RESPONSE: The Registrant described the transaction in detail in the letter
     dated December 26, 2006, which was filed as correspondence related to the
     special meeting of shareholders of Janus Money Market Fund and Janus
     Government Money Market Fund, each a series of Janus Investment Fund
     ("JIF"), another registered investment company managed by Janus Capital
     Management LLC, to be held on February 16, 2007, a copy of which was
     previously provided to you via email on February 15, 2007. In addition, as
     discussed, the Institutional Shares and Service Shares of Janus
     Institutional Money Market Fund and Janus Institutional Government Money
     Market Fund will contain assets of those same share classes that exist in
     Janus Money Market Fund and Janus Government Money Market Fund, subject to
     shareholder approval of those assets transferring from JIF into these
     series of the Registrant. The other share classes of Janus Institutional
     Money Market Fund and Janus Institutional Government Money Market Fund
     (Premium, Select and Primary) are new share classes that are not connected
     to the spin-off of JIF assets noted above.

5.   COMMENT: The Staff inquired whether Select Shares could impose sales
     charges, redemption fees, or exchange fees in light of disclosure that
     "Select Shares generally do not impose sales charges, redemption fees, or
     exchange fees when you buy or sell the Fund's Shares."

     RESPONSE: The word "generally" has been removed from the disclosure, as
     Select Shares do not impose sales charges, redemption fees, or exchange
     fees.

6.   COMMENT: The Staff inquired whether required new "Fund of Funds" rule
     disclosure had been included in the prospectus.

     RESPONSE: To the extent that the Funds would have underlying fund fees and
     expenses that reach the required disclosure threshold, such disclosure
     would be included in the fee tables.

7.   COMMENT: The Staff indicated that the footnotes to the fees and expenses
     table should





     follow the expense examples.

     RESPONSE: As discussed during the call, the Registrant believes that the
     most effective presentation of the information is reflected in the current
     disclosure and is consistent with Item 3 of Form N-1A. Additionally,
     General Instruction C.1(a) to Form N-1A provides that a fund should use
     document design techniques that promote effective communication which the
     Registrant believes is consistent with its current disclosure.

8.   COMMENT: The Staff inquired whether any expense recoupment was applicable
     to the Funds.

     RESPONSE: The Registrant confirms that no recoupment is applicable.

9.   COMMENT: The Staff inquired whether applicable fee waiver agreements have
     been included as exhibits to the filing.

     RESPONSE: The Registrant confirms that its practice, although not required
     under Part C to Form N-1A, is to include the investment advisory fee waiver
     agreements as exhibits in a subsequent post-effective amendment filing.

10.  COMMENT: The Staff asked for confirmation that the disclosed administrative
     services fee paid by certain share classes of each Fund will not be used to
     pay for distribution that would otherwise be required to be paid pursuant
     to a Rule 12b-1 Plan.

     RESPONSE: To the best knowledge of the Registrant, the administrative
     services fee is designed for payment of administrative services and not
     distribution.

11.  COMMENT: The Staff asked for confirmation that the Funds do not invest in
     inverse floaters and inquired whether the Funds intend to invest in inverse
     floaters.

     RESPONSE: The Registrant confirms that the Funds do not invest in inverse
     floaters and, to the knowledge of the Registrant as of the date of the
     prospectus, do not intend to invest in inverse floaters.

12.  COMMENT: The Staff inquired whether there was any emerging markets risk
     related to the Funds that should be disclosed in the prospectus.

     RESPONSE: The Registrant confirms that emerging markets risk disclosure is
     not applicable.

13.  COMMENT: The Staff indicated that disclosure regarding industry
     concentration in the prospectus was inconsistent with fundamental policy
     disclosure in the SAI.

     RESPONSE: Prospectus disclosure reflects that a Fund may invest more than
     25% of its total assets in tax-exempt securities that are related in such a
     way that an economic,





     business, or political development affecting one such security could
     similarly affect the other securities. The risk of such investments exists
     outside of specific industry concentration. The SAI sets forth the general
     restriction that a Fund may not purchase securities if 25% or more of the
     value of its total assets would be invested in the securities of issuers
     conducting their principal business activities in the same industry (with
     certain exceptions).

14.  COMMENT: The Staff suggested adding single country risk disclosure if a
     Fund invests in issuers of a single country if greater than 25%.

     RESPONSE: The Registrant acknowledges the comment and, if applicable,
     intends to add such disclosure.

15.  COMMENT: The Staff indicated that disclosure in the prospectus which
     indicates that Institutional Government Money Market Fund "invests
     exclusively in" certain securities appears inconsistent with the SAI which
     permits broader investments.

     RESPONSE: The prospectus disclosure regarding the Fund's intent to
     exclusively invest in certain securities is not considered to be
     inconsistent with the SAI disclosure which provides broader flexibility.
     Further clarity regarding any such confusion will be revisited in
     subsequent amendments to the registration statement.

16.  COMMENT: The Staff inquired whether disclosure of fee waivers in the
     "Management Expenses" section of the prospectus is consistent with the
     information contained in the fee table.

     RESPONSE: The Registrant confirms that such disclosure is consistent.

17.  COMMENT: The Staff inquired whether notice would be provided if the minimum
     investments requirements for the Funds changed.

     RESPONSE: The Registrant confirms the prospectus would be supplemented.

Statement of Additional Information

18.  COMMENT: The Staff asked whether industry concentration disclosure was
     inconsistent with disclosure in the prospectus.

     RESPONSE: See Response to Comment No. 13.

19.  COMMENT: The Staff inquired regarding the extent that the Funds may lend
     their securities and whether additional disclosures should be made.

     RESPONSE: Disclosure regarding the Funds' potential lending of its
     securities is included in the Funds' prospectus and SAI.





20.  COMMENT: The Staff indicated that to the extent borrowing by a Fund exceeds
     5%, disclosure should be included in the prospectus. The Staff indicated
     that the Registrant should adopt a non-fundamental policy limiting new
     investments to the extent that borrowing exceeds 5%.

     RESPONSE: As discussed, the Funds do not currently intend to borrow for
     leverage. In addition, since the SAI states that "Each Fund may not borrow
     money except that a Fund may borrow money for temporary or emergency
     purposes (not for leveraging or investment)" and has N-1A disclosure on
     borrowing, we respectfully decline to add any new disclosure in this regard
     and believe that any such new disclosure may potentially be confusing given
     that no Fund intends to do so.

21.  COMMENT: The Staff inquired whether securities lending disclosure in the
     SAI was applicable to Janus Institutional Government Money Market Fund, in
     light of disclosure in the Prospectus that the Fund invests exclusively in
     government securities.

     RESPONSE: The prospectus disclosure regarding the Fund's intent to
     exclusively invest in certain securities is not considered to be
     inconsistent with the noted SAI disclosure. Further clarity regarding any
     such confusion will be revisited in subsequent amendments to the
     registration statement.

22.  COMMENT: The Staff requested that the Registrant provide a Tandy
     representation in a response letter to be filed as correspondence separate
     from the filing.

     RESPONSE: The Registrant provides its response below.

The Registrant acknowledges responsibility for the adequacy and accuracy of the
disclosure in the filings. In addition, the Registrant acknowledges that Staff
comments, or changes to disclosure in response to Staff comments in the filings
reviewed by the Staff, do not foreclose the Commission from taking any action
with respect to the filing.

If you have any concerns regarding the above responses, please call me at (303)
394-6459. Thank you for your assistance in this matter.

Regards,

/s/ Stephanie Grauerholz-Lofton

Stephanie Grauerholz-Lofton
Vice President

cc:  Kelley Abbott Howes, Esq.
     Cindy Antonson
     Donna Brungardt