Exhibit B

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a statement on Schedule 13G (including amendments thereto) with respect to the common stock, par value $0.01 per share, of Mack-Cali Realty Corporation.

Dated: February 12, 2010		/s/ William L. Mack
		William L. Mack
Dated: February 12, 2010		/s/ Earle I. Mack
		Earle I. Mack
Dated: February 12, 2010		/s/ Mitchell E. Hersh
		Mitchell E. Hersh
Dated: February 12, 2010		/s/ David S. Mack
		David S. Mack
Dated: February 12, 2010		/s/ Fredric Mack
		Fredric Mack
Dated: February 12, 2010		/s/ Richard Mack
		Richard Mack
Dated: February 12, 2010		/s/ Stephen Mack
		Stephen Mack
Dated: February 12, 2010		/s/ William L. Mack
		William L. Mack, as Trustee for The
		William and Phyllis Mack Foundation, Inc.
Dated: February 12, 2010		/s/ William L. Mack
		William L. Mack, as Trustee for The
		William L. Mack Grantor Retained Annuity Trust
Dated: February 12, 2010		/s/ David S. Mack
		David S. Mack, as Trustee for The
		David and Sondra Mack Foundation
Dated: February 12, 2010		/s/ Stephen Mack
		Stephen Mack, as Trustee for The
		Stephen Mack and Kelly Mack Family Foundation

Dated: February 12, 2010		/s/ Phyllis Mack
		Phyllis Mack, as Trustee for Trust
		f/b/o Richard Mack
Dated: February 12, 2010		/s/ Phyllis Mack
		Phyllis Mack, as Trustee for Trust
		f/b/o Stephen Mack
Dated: February 12, 2010		/s/ Michael Schwartzbard
		Michael Schwartzbard, as Trustee for the
		Andrew Mack 4/30/07 Trust
Dated: February 12, 2010		/s/ Michael Schwartzbard
		Michael Schwartzbard, as Trustee for the
		Beatrice Mack 4/30/07 Trust