EXHIBIT 31.1

  CERTIFICATION PURSUANT TO RULE 13A-14 OF THE SECURITIES EXCHANGE ACT OF 1934,
      AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Thomas H. Reslewic, Chief Executive Officer, certify that:

1.  I have reviewed this quarterly report on Form 10-Q of LeCroy
    Corporation;

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)) and internal control over financial
    reporting (as defined in Exchange Act Rules 13a-15(f) and
    15d-15(f) 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.  Designed such internal control over financial reporting, or
        caused such internal control over financial reporting to be
        designed under our supervision, to provide reasonable
        assurance regarding the reliability of financial reporting and
        the preparation of financial statements for external purposes
        in accordance with generally accepted accounting principles;

    c.  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

    d.  Disclosed in this report any change in the registrant's
        internal control over financial reporting that occurred during
        the registrant's most recent fiscal quarter (the registrant's
        fourth fiscal quarter in the case of an annual report) that
        has materially affected, or is reasonably likely to materially
        affect, the registrant's internal control over financial
        reporting.

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.

        November 10, 2005

        /s/ Thomas H. Reslewic
        -----------------------
        Thomas H. Reslewic
        Chief Executive Officer