**EXHIBIT 31(i)**
**Rule 13a-14(a)/15d-14(a) Certification of Mr. William Wrigley Jr.**
I, William Wrigley, Jr., Chairman of the Board and Chief Executive Officer of Wm. Wrigley Jr. Company, certify that:   1. I have reviewed this annual report on Form 10-K of Wm. Wrigley Jr. Company;    2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state amaterial fact necessary to make the statements made, in light of the circumstances under which such statements were made, notmisleading 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, fairlypresent in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, theperiods presented in this report;    4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controlsand procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as definedin 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 oursupervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made knownto 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 bedesigned under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparationof financial statements for external purposes in accordance with the generally accepted accounting principles;      (c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusionsabout the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on suchevaluation; and      (d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during theregistrant’s most recent fiscal quarter (the registrant’s fourth quarter in the case of an annual report) that has materiallyaffected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and;    5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internalcontrol over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (orpersons performing the equivalent functions):      (a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reportingwhich are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financialinformation; and      (b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’sinternal control over financial reporting.    Date: February 11, 2005     /s/ WILLIAM WRIGLEY, JR. William Wrigley, Jr. Chairman of the Board, President and