United States securities and exchange commission logo

                           August 17, 2020

       Manuel C. Alves Aivado, M.D., Ph.D.
       President and Chief Executive Officer
       Aileron Therapeutics, Inc.
       490 Arsenal Way, Suite 210
       Watertown, MA 02472

                                                        Re: Aileron
Therapeutics, Inc.
Statement on Form S-3
                                                            Filed August 11,
                                                            File No. 333-244367

       Dear Dr. Aivado:

              This is to advise you that we have not reviewed and will not
review your registration

               Please refer to Rules 460 and 461 regarding requests for
acceleration. We remind you
       that the company and its management are responsible for the accuracy and
adequacy of their
       disclosures, notwithstanding any review, comments, action or absence of
action by the staff.

                                                        Please contact Jeffrey
Gabor at 202-551-2544 with any questions.


                           Division of Corporation Finance

                           Office of Life Sciences
       cc:                                              Stuart M. Falber, Esq.