CERTIFICATION OF CHIEF EXECUTIVE OFFICER
                   PURSUANT TO RULE 13a-14
          UNDER THE SECURITIES EXCHANGE ACT OF 1934


I, William C. Weldon, certify that:

     1. I have reviewed this quarterly report on Form 10-Q
of Johnson & Johnson (the "registrant");

     2. Based on my knowledge, this quarterly 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 quarterly report;

     3. Based on my knowledge, the financial statements, and
other financial information included in this quarterly
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
quarterly report;

     4. The registrant's other certifying officers and I are
responsible for establishing and maintaining disclosure
controls and procedures (as defined in Exchange Act Rules
13a-14 and 15d-14) for the registrant and we have:

          a)  designed such disclosure controls and
     procedures, or caused such disclosure controls and
     procedures to be designed, under our supervision;

          b)  designed, or caused to be designed, such
     disclosure controls and procedures 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 quarterly report is
     being prepared; and

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

     5.  The registrant's other certifying officers and I
are responsible for establishing and maintaining internal
controls over financial reporting (as defined in Exchange
Act Rules 13a-14 and 15d-14) for the registrant and we have:

          a)  designed such internal controls, or caused
     such controls to be designed under our supervision;

          b)  designed such internal controls 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)  disclosed in this quarterly report any changes
     in the registrant's internal controls that occurred
     during this quarter that has materially affected, or is
     reasonably likely to materially affect, the
     registrant's internal controls over financial
     reporting; and

          d)  disclosed, based on our most recent evaluation
     of the registrant's internal controls over financial
     reporting, to the registrant's auditors and audit
     committee (or persons performing the equivalent
     functions):

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

               (ii)  any fraud, whether or not material,
          that involves management or other employees who
          have a significant role in the registrant's
          internal controls over financial reporting

     6. The registrant's other certifying officers and I
have indicated in this quarterly report whether or not there
were significant changes in internal controls or in other
factors that could significantly affect internal controls
subsequent to the date of our most recent evaluation,
including any corrective actions with regard to significant
deficiencies and material weaknesses.

Date: August 11, 2003

                         /s/ William C. Weldon
                         William C. Weldon
                         Chief Executive Officer
          CERTIFICATION OF CHIEF FINANCIAL OFFICER
                   PURSUANT TO RULE 13a-14
          UNDER THE SECURITIES EXCHANGE ACT OF 1934


I, Robert J. Darretta, certify that:

     1. I have reviewed this quarterly report on Form 10-Q
of Johnson & Johnson (the "registrant");

     2. Based on my knowledge, this quarterly 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 quarterly report;

     3. Based on my knowledge, the financial statements, and
other financial information included in this quarterly
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
quarterly report;

     4. The registrant's other certifying officers and I are
responsible for establishing and maintaining disclosure
controls and procedures (as defined in Exchange Act Rules
13a-14 and 15d-14) for the registrant and we have:

          a)  designed such disclosure controls and
     procedures, or caused such disclosure controls and
     procedures to be designed, under our supervision;

          b)  designed, or caused to be designed, such
     disclosure controls and procedures 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 quarterly report is
     being prepared; and

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

     5.  The registrant's other certifying officers and I
are responsible for establishing and maintaining internal
controls over financial reporting (as defined in Exchange
Act Rules 13a-14 and 15d-14) for the registrant and we have:

          a)  designed such internal controls, or caused
     such controls to be designed under our supervision;

          b)  designed such internal controls 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)  disclosed in this quarterly report any changes
     in the registrant's internal controls that occurred
     during this quarter that has materially affected, or is
     reasonably likely to materially affect, the
     registrant's internal controls over financial
     reporting; and

          d)  disclosed, based on our most recent evaluation
     of the registrant's internal controls over financial
     reporting, to the registrant's auditors and audit
     committee (or persons performing the equivalent
     functions):

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

               (ii)  any fraud, whether or not material,
          that involves management or other employees who
          have a significant role in the registrant's
          internal controls over financial reporting

     6. The registrant's other certifying officers and I
have indicated in this quarterly report whether or not there
were significant changes in internal controls or in other
factors that could significantly affect internal controls
subsequent to the date of our most recent evaluation,
including any corrective actions with regard to significant
deficiencies and material weaknesses.

Date: August 11, 2003

                         /s/ Robert J. Darretta
                         Robert J. Darretta
                         Chief Financial Officer