EXHIBIT 31
                                                                      ----------
                           CERTIFICATION BY MYRON LEVY

               PURSUANT TO SECURITIES EXCHANGE ACT RULE 13a-14(a)

I, Myron Levy, certify that:

        1.     I have  reviewed  this  Quarterly  Report  on Form 10-Q of Herley
               Industries, Inc.;

        2.     Based on my  knowledge,  this  report does not contain any untrue
               statement  of a material  fact or omit to state a  material  fact
               necessary  to  make  the   statements   made,  in  light  of  the
               circumstances   under  which  such   statements  were  made,  not
               misleading with respect to the period covered by this report;

        3.     Based  on my  knowledge,  the  financial  statements,  and  other
               financial  information included in this report, fairly present in
               all  material  respects  the  financial  condition,   results  of
               operations  and cash flows of the  registrant as of, and for, the
               periods presented in this report;

        4.     The   registrant's   other   certifying   officer(s)  and  I  are
               responsible for establishing and maintaining  disclosure controls
               and  procedures  (as defined in Exchange Act Rules  13a-15(e) and
               15d-15(e))   for  the  registrant  and  have:

               a.   designed such disclosure controls and procedures,  or caused
                    such disclosure controls and procedures to be designed under
                    our  supervision,   to  ensure  that  material   information
                    relating  to  the  registrant,  including  its  consolidated
                    subsidiaries,  is made  known to us by others  within  those
                    entities,  particularly  during  the  period  in which  this
                    report is being prepared;

               b.   evaluated the  effectiveness of the registrant's  disclosure
                    controls  and  procedures  and  presented in this report our
                    conclusions   about  the  effectiveness  of  the  disclosure
                    controls and procedures, as of the end of the period covered
                    by this report based on such evaluation; and

               c.   disclosed  in this  report  any  change in the  registrant's
                    internal  control over  financial  reporting  that  occurred
                    during  the  quarter  ended May 1, 2005 that has  materially
                    affected,  or is reasonably likely to materially affect, the
                    registrant's internal control over financial reporting; and

        5.     The  registrant's   other   certifying   officer(s)  and  I  have
               disclosed,  based  on our  most  recent  evaluation  of  internal
               control over financial  reporting,  to the registrant's  auditors
               and the audit  committee of the  registrant's  board of directors
               (or  persons  performing  the  equivalent   functions):

                    a.   all significant deficiencies and material weaknesses in
                         the  design  or  operation  of  internal  control  over
                         financial  reporting  which  are  reasonably  likely to
                         adversely  affect the  registrant's  ability to record,
                         process,  summarize and report  financial  information;
                         and

                    b.   any  fraud,  whether  or not  material,  that  involves
                         management  or other  employees  who have a significant
                         role  in  the   registrant's   internal   control  over
                         financial reporting.


                                         Date:  June 10, 2005

                                         By:         /s/ Myron Levy
                                                ------------------------------
                                         Name:  Myron Levy
                                         Title: Vice Chairman of the Board and
                                                Chief Executive Officer







                        CERTIFICATION BY THOMAS V. GILBOY

               PURSUANT TO SECURITIES EXCHANGE ACT RULE 13a-14(a)

I, Thomas V. Gilboy, certify that:

        1.     I have  reviewed  this  Quarterly  Report  on Form 10-Q of Herley
               Industries, Inc.;

        2.     Based on my  knowledge,  this  report does not contain any untrue
               statement  of a material  fact or omit to state a  material  fact
               necessary  to  make  the   statements   made,  in  light  of  the
               circumstances   under  which  such   statements  were  made,  not
               misleading with respect to the period covered by this report;

        3.     Based  on my  knowledge,  the  financial  statements,  and  other
               financial  information included in this report, fairly present in
               all  material  respects  the  financial  condition,   results  of
               operations  and cash flows of the  registrant as of, and for, the
               periods presented in this report;

        4.     The   registrant's   other   certifying   officer(s)  and  I  are
               responsible for establishing and maintaining  disclosure controls
               and  procedures  (as defined in Exchange Act Rules  13a-15(e) and
               15d-15(e))   for  the  registrant  and  have:

                    a.   designed such disclosure  controls and  procedures,  or
                         caused such  disclosure  controls and  procedures to be
                         designed under our supervision, to ensure that material
                         information  relating to the registrant,  including its
                         consolidated  subsidiaries,  is  made  known  to  us by
                         others within those entities,  particularly  during the
                         period in which this report is being prepared;

                    b.   evaluated  the   effectiveness   of  the   registrant's
                         disclosure  controls and  procedures  and  presented in
                         this report our conclusions  about the effectiveness of
                         the disclosure  controls and procedures,  as of the end
                         of the  period  covered  by this  report  based on such
                         evaluation; and

                    c.   disclosed in this report any change in the registrant's
                         internal control over financial reporting that occurred
                         during  the   quarter   ended  May  1,  2005  that  has
                         materially   affected,   or  is  reasonably  likely  to
                         materially  affect,  the registrant's  internal control
                         over financial reporting; and

        5.     The  registrant's   other   certifying   officer(s)  and  I  have
               disclosed,  based  on our  most  recent  evaluation  of  internal
               control over financial  reporting,  to the registrant's  auditors
               and the audit  committee of the  registrant's  board of directors
               (or  persons  performing  the  equivalent   functions):

                    a.   all significant deficiencies and material weaknesses in
                         the  design  or  operation  of  internal  control  over
                         financial  reporting  which  are  reasonably  likely to
                         adversely  affect the  registrant's  ability to record,
                         process,  summarize and report  financial  information;
                         and

                    b.   any  fraud,  whether  or not  material,  that  involves
                         management  or other  employees  who have a significant
                         role  in  the   registrant's   internal   control  over
                         financial reporting.

                                         Date:   June 10, 2005

                                         By:          /s/ Thomas V. Gilboy
                                                 ------------------------------
                                         Name:   Thomas V. Gilboy
                                         Title:  Chief Financial Officer