[Janus Letterhead]



March 2, 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 is to respond 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. 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 Registrant has revised prospectus disclosure to reflect
         that the Fund "normally invests exclusively" in certain securities.

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: See Response to Comment No. 15.

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, Janus Capital Management LLC

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