Mail Stop 4561 March 23, 2006 Mr. Mitchell E. Hersh President and Chief Executive Officer Mack-Cali Realty Corporation 11 Commerce Drive Cranford, NJ 07016 Re: Mack-Cali Realty Corporation Form 10-K for Fiscal Year Ended December 31, 2005 Filed February 23, 2006 File No. 1-13274 Dear Mr. Hersh: We have reviewed your filing and have the following comment. We have limited our review of your filing to the issue we have addressed in our comment. Where indicated, we think you should revise your documents in response to this comment in future filings. If you disagree, we will consider your explanation as to why our comment is inapplicable or a revision is unnecessary. Please be as detailed as necessary in your explanation. After reviewing this information, we may raise additional comments. Please understand that the purpose of our review process is to assist you in your compliance with the applicable disclosure requirements and to enhance the overall disclosure in your filing. We look forward to working with you in these respects. We welcome any questions you may have about our comment or any other aspect of our review. Feel free to call us at the telephone numbers listed at the end of this letter. Form 10-K for the Fiscal Year Ended December 31, 2005 Exhibits Exhibits 31.1 and 31.2 1. We note that your certifications include the title of the certifying individual in the "I, [identify the certifying individual], certify that:" line. Considering that the certifications must be signed in a personal capacity, please confirm to us that your officers signed such certifications in a personal capacity and that you will revise your certifications in future filings to exclude the title of the certifying individual from the opening sentence. As appropriate, please respond to this comment within 10 business days or tell us when you will provide us with a response. Please furnish a cover letter with your proposed revisions that keys your response to our comment and provides any requested information. Detailed cover letters greatly facilitate our review. Please file your cover letter on EDGAR. Please understand that we may have additional comments after reviewing your response to our comment. We urge all persons who are responsible for the accuracy and adequacy of the disclosure in the filing to be certain that the filing includes all information required under the Securities Exchange Act of 1934 and that they have provided all information investors require for an informed investment decision. Since the company and its management are in possession of all facts relating to a company`s disclosure, they are responsible for the accuracy and adequacy of the disclosures they have made. In connection with responding to our comment, please provide, in writing, a statement from the company acknowledging that: * the company is responsible for the adequacy and accuracy of the disclosure in the filing; * staff comments or changes to disclosure in response to staff comments do not foreclose the Commission from taking any action with respect to the filing; and * the company may not assert staff comments as a defense in any proceeding initiated by the Commission or any person under the federal securities laws of the United States. In addition, please be advised that the Division of Enforcement has access to all information you provide to the staff of the Division of Corporation Finance in our review of your filing or in response to our comment on your filing. You may contact Amanda Sledge, Staff Accountant, at (202) 551- 3473 or the undersigned at (202) 551-3403 if you have questions. Sincerely, Steven Jacobs Accounting Branch Chief Mr. Mitchell E. Hersh Mack-Cali Realty Corporation March 23, 2006 Page 2