Exhibit (24) 

**DIRECTOR’S POWER OF ATTORNEY**

(2006 Form 10-K) 

The undersigned director of Marshall & Ilsley Corporation designates each of Mark F. Furlong and Randall J. Erickson, with the power ofsubstitution, as his true and lawful attorney-in-fact for the purpose of: (i) executing in his name and on his behalf Marshall & Ilsley Corporation’s Form 10-K for the fiscal year ended December 31, 2006 and any relatedamendments and/or supplements; (ii) generally doing all things in his name and on his behalf in his capacity as a director to enable Marshall & Ilsley Corporation to comply with the provisions of the Securities Exchange Actof 1934, as amended, and all requirements of the Securities and Exchange Commission; and (iii) ratifying and confirming his signature as it may be signed by the attorney-in-fact to the Form 10-K and any related amendments and/orsupplements. 

Dated this 28th day of February, 2007. 

 

**DIRECTOR’S POWER OF ATTORNEY**

(2006 Form 10-K) 

The undersigned director of Marshall & Ilsley Corporationdesignates each of Mark F. Furlong and Randall J. Erickson, with the power of substitution, as his true and lawful attorney-in-fact for the purpose of: (i) executing in his name and on his behalf Marshall & Ilsley Corporation’sForm 10-K for the fiscal year ended December 31, 2006 and any related amendments and/or supplements; (ii) generally doing all things in his name and on his behalf in his capacity as a director to enable Marshall & IlsleyCorporation to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission; and (iii) ratifying and confirming his signature as it may be signed by theattorney-in-fact to the Form 10-K and any related amendments and/or supplements. 

Dated this 28th day of February, 2007. 

 
/s/ Andrew N. BaurAndrew N. Baur

**DIRECTOR’S POWER OF ATTORNEY**

(2006 Form 10-K) 

The undersigned director of Marshall & Ilsley Corporationdesignates each of Mark F. Furlong and Randall J. Erickson, with the power of substitution, as his true and lawful attorney-in-fact for the purpose of: (i) executing in his name and on his behalf Marshall & Ilsley Corporation’sForm 10-K for the fiscal year ended December 31, 2006 and any related amendments and/or supplements; (ii) generally doing all things in his name and on his behalf in his capacity as a director to enable Marshall & IlsleyCorporation to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission; and (iii) ratifying and confirming his signature as it may be signed by theattorney-in-fact to the Form 10-K and any related amendments and/or supplements. 

Dated this 28th day of February, 2007. 

 
/s/ Jon F. ChaitJon F. Chait

**DIRECTOR’S POWER OF ATTORNEY**

(2006 Form 10-K) 

The undersigned director of Marshall & Ilsley Corporationdesignates each of Mark F. Furlong and Randall J. Erickson, with the power of substitution, as his true and lawful attorney-in-fact for the purpose of: (i) executing in his name and on his behalf Marshall & Ilsley Corporation’sForm 10-K for the fiscal year ended December 31, 2006 and any related amendments and/or supplements; (ii) generally doing all things in his name and on his behalf in his capacity as a director to enable Marshall & IlsleyCorporation to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission; and (iii) ratifying and confirming his signature as it may be signed by theattorney-in-fact to the Form 10-K and any related amendments and/or supplements. 

Dated this 28th day of February, 2007. 

 
/s/ John W. Daniels, Jr.John W. Daniels, Jr.

**DIRECTOR’S POWER OF ATTORNEY**

(2006 Form 10-K) 

The undersigned director of Marshall & Ilsley Corporationdesignates Dennis J. Kuester and Randall J. Erickson, with the power of substitution, as his true and lawful attorney-in-fact for the purpose of: (i) executing in his name and on his behalf Marshall & Ilsley Corporation’s Form10-K for the fiscal year ended December 31, 2006 and any related amendments and/or supplements; (ii) generally doing all things in his name and on his behalf in his capacity as a director to enable Marshall & Ilsley Corporation tocomply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission; and (iii) ratifying and confirming his signature as it may be signed by the attorney-in-fact tothe Form 10-K and any related amendments and/or supplements. 

Dated this 28th day of February, 2007. 

 
/s/ Mark F. FurlongMark F. Furlong

**DIRECTOR’S POWER OF ATTORNEY**

(2006 Form 10-K) 

The undersigned director of Marshall & Ilsley Corporationdesignates each of Mark F. Furlong and Randall J. Erickson, with the power of substitution, as his true and lawful attorney-in-fact for the purpose of: (i) executing in his name and on his behalf Marshall & Ilsley Corporation’sForm 10-K for the fiscal year ended December 31, 2006 and any related amendments and/or supplements; (ii) generally doing all things in his name and on his behalf in his capacity as a director to enable Marshall & IlsleyCorporation to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission; and (iii) ratifying and confirming his signature as it may be signed by theattorney-in-fact to the Form 10-K and any related amendments and/or supplements. 

Dated this 28th day of February, 2007. 

 
/s/ Bruce E. JacobsBruce E. Jacobs

**DIRECTOR’S POWER OF ATTORNEY**

(2006 Form 10-K) 

The undersigned director of Marshall & Ilsley Corporationdesignates each of Mark F. Furlong and Randall J. Erickson, with the power of substitution, as his true and lawful attorney-in-fact for the purpose of: (i) executing in his name and on his behalf Marshall & Ilsley Corporation’sForm 10-K for the fiscal year ended December 31, 2006 and any related amendments and/or supplements; (ii) generally doing all things in his name and on his behalf in his capacity as a director to enable Marshall & IlsleyCorporation to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission; and (iii) ratifying and confirming his signature as it may be signed by theattorney-in-fact to the Form 10-K and any related amendments and/or supplements. 

Dated this _1st_ day of February, 2007.

 
/s/ Ted D. KellnerTed D. Kellner

**DIRECTOR’S POWER OF ATTORNEY**

(2006 Form 10-K) 

The undersigned director of Marshall & Ilsley Corporationdesignates each of Mark F. Furlong and Randall J. Erickson, with the power of substitution, as his true and lawful attorney-in-fact for the purpose of: (i) executing in his name and on his behalf Marshall & Ilsley Corporation’sForm 10-K for the fiscal year ended December 31, 2006 and any related amendments and/or supplements; (ii) generally doing all things in his name and on his behalf in his capacity as a director to enable Marshall & IlsleyCorporation to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission; and (iii) ratifying and confirming his signature as it may be signed by theattorney-in-fact to the Form 10-K and any related amendments and/or supplements. 

Dated this 28th day of February, 2007. 

 

/s/ Dennis J. Kuester

 

Dennis J. Kuester

 

**DIRECTOR’S POWER OF ATTORNEY**

(2006 Form 10-K) 

The undersigned director of Marshall & Ilsley Corporationdesignates each of Mark F. Furlong and Randall J. Erickson, with the power of substitution, as her true and lawful attorney-in-fact for the purpose of: (i) executing in her name and on her behalf Marshall & Ilsley Corporation’sForm 10-K for the fiscal year ended December 31, 2006 and any related amendments and/or supplements; (ii) generally doing all things in her name and on her behalf in her capacity as a director to enable Marshall & IlsleyCorporation to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission; and (iii) ratifying and confirming her signature as it may be signed by theattorney-in-fact to the Form 10-K and any related amendments and/or supplements. 

Dated this 28th day of February, 2007. 

 

/s/ Katharine C. Lyall

 

Katharine C. Lyall

 

**DIRECTOR’S POWER OF ATTORNEY**

(2006 Form 10-K) 

The undersigned director of Marshall & Ilsley Corporationdesignates each of Mark F. Furlong and Randall J. Erickson, with the power of substitution, as his true and lawful attorney-in-fact for the purpose of: (i) executing in his name and on his behalf Marshall & Ilsley Corporation’sForm 10-K for the fiscal year ended December 31, 2006 and any related amendments and/or supplements; (ii) generally doing all things in his name and on his behalf in his capacity as a director to enable Marshall & IlsleyCorporation to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission; and (iii) ratifying and confirming his signature as it may be signed by theattorney-in-fact to the Form 10-K and any related amendments and/or supplements. 

Dated this 1st day of February, 2007. 

 

/s/ John A. Mellowes

 
John A. Mellowes

**DIRECTOR’S POWER OF ATTORNEY**

(2006 Form 10-K) 

The undersigned director of Marshall & Ilsley Corporationdesignates each of Mark F. Furlong and Randall J. Erickson, with the power of substitution, as his true and lawful attorney-in-fact for the purpose of: (i) executing in his name and on his behalf Marshall & Ilsley Corporation’sForm 10-K for the fiscal year ended December 31, 2006 and any related amendments and/or supplements; (ii) generally doing all things in his name and on his behalf in his capacity as a director to enable Marshall & IlsleyCorporation to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission; and (iii) ratifying and confirming his signature as it may be signed by theattorney-in-fact to the Form 10-K and any related amendments and/or supplements. 

Dated this 28th day of February, 2007. 

 
/s/ Edward L. Meyer, Jr.Edward L. Meyer, Jr.

**DIRECTOR’S POWER OF ATTORNEY**

(2006 Form 10-K) 

The undersigned director of Marshall & Ilsley Corporationdesignates each of Mark F. Furlong and Randall J. Erickson, with the power of substitution, as his true and lawful attorney-in-fact for the purpose of: (i) executing in his name and on his behalf Marshall & Ilsley Corporation’sForm 10-K for the fiscal year ended December 31, 2006 and any related amendments and/or supplements; (ii) generally doing all things in his name and on his behalf in his capacity as a director to enable Marshall & IlsleyCorporation to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission; and (iii) ratifying and confirming his signature as it may be signed by theattorney-in-fact to the Form 10-K and any related amendments and/or supplements. 

Dated this 28th day of February, 2007. 

 
/s/ San W. Orr, Jr.San W. Orr, Jr.

**DIRECTOR’S POWER OF ATTORNEY**

(2006 Form 10-K) 

The undersigned director of Marshall & Ilsley Corporationdesignates each of Mark F. Furlong and Randall J. Erickson, with the power of substitution, as his true and lawful attorney-in-fact for the purpose of: (i) executing in his name and on his behalf Marshall & Ilsley Corporation’sForm 10-K for the fiscal year ended December 31, 2006 and any related amendments and/or supplements; (ii) generally doing all things in his name and on his behalf in his capacity as a director to enable Marshall & IlsleyCorporation to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission; and (iii) ratifying and confirming his signature as it may be signed by theattorney-in-fact to the Form 10-K and any related amendments and/or supplements. 

Dated this 28th day of February, 2007. 

 
/s/ Robert J. O’TooleRobert J. O’Toole

**DIRECTOR’S POWER OF ATTORNEY**

(2006 Form 10-K) 

The undersigned director of Marshall & Ilsley Corporationdesignates each of Mark F. Furlong and Randall J. Erickson, with the power of substitution, as his true and lawful attorney-in-fact for the purpose of: (i) executing in his name and on his behalf Marshall & Ilsley Corporation’sForm 10-K for the fiscal year ended December 31, 2006 and any related amendments and/or supplements; (ii) generally doing all things in his name and on his behalf in his capacity as a director to enable Marshall & IlsleyCorporation to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission; and (iii) ratifying and confirming his signature as it may be signed by theattorney-in-fact to the Form 10-K and any related amendments and/or supplements. 

Dated this 28th day of February, 2007. 

 
/s/ Peter M. Platten, IIIPeter M. Platten, III

**DIRECTOR’S POWER OF ATTORNEY**

(2006 Form 10-K) 

The undersigned director of Marshall & Ilsley Corporationdesignates each of Mark F. Furlong and Randall J. Erickson, with the power of substitution, as his true and lawful attorney-in-fact for the purpose of: (i) executing in his name and on his behalf Marshall & Ilsley Corporation’sForm 10-K for the fiscal year ended December 31, 2006 and any related amendments and/or supplements; (ii) generally doing all things in his name and on his behalf in his capacity as a director to enable Marshall & IlsleyCorporation to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission; and (iii) ratifying and confirming his signature as it may be signed by theattorney-in-fact to the Form 10-K and any related amendments and/or supplements. 

Dated this 28th day of February, 2007. 

 
/s/ John S. ShielyJohn S. Shiely

**DIRECTOR’S POWER OF ATTORNEY**

(2006 Form 10-K) 

The undersigned director of Marshall & Ilsley Corporationdesignates each of Mark F. Furlong and Randall J. Erickson, with the power of substitution, as her true and lawful attorney-in-fact for the purpose of: (i) executing in her name and on her behalf Marshall & Ilsley Corporation’sForm 10-K for the fiscal year ended December 31, 2006 and any related amendments and/or supplements; (ii) generally doing all things in her name and on her behalf in her capacity as a director to enable Marshall & IlsleyCorporation to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission; and (iii) ratifying and confirming her signature as it may be signed by theattorney-in-fact to the Form 10-K and any related amendments and/or supplements. 

Dated this 17th day of January, 2007. 

 
/s/ Debra S. WallerDebra S. Waller

**DIRECTOR’S POWER OF ATTORNEY**

(2006 Form 10-K) 

The undersigned director of Marshall & Ilsley Corporationdesignates each of Mark F. Furlong and Randall J. Erickson, with the power of substitution, as his true and lawful attorney-in-fact for the purpose of: (i) executing in his name and on his behalf Marshall & Ilsley Corporation’sForm 10-K for the fiscal year ended December 31, 2006 and any related amendments and/or supplements; (ii) generally doing all things in his name and on his behalf in his capacity as a director to enable Marshall & IlsleyCorporation to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission; and (iii) ratifying and confirming his signature as it may be signed by theattorney-in-fact to the Form 10-K and any related amendments and/or supplements. 

Dated this 1st day of February, 2007. 

 
/s/ George E. WardebergGeorge E. Wardeberg

**DIRECTOR’S POWER OF ATTORNEY**

(2006 Form 10-K) 

The undersigned director of Marshall & Ilsley Corporationdesignates each of Mark F. Furlong and Randall J. Erickson, with the power of substitution, as his true and lawful attorney-in-fact for the purpose of: (i) executing in his name and on his behalf Marshall & Ilsley Corporation’sForm 10-K for the fiscal year ended December 31, 2006 and any related amendments and/or supplements; (ii) generally doing all things in his name and on his behalf in his capacity as a director to enable Marshall & IlsleyCorporation to comply with the provisions of the Securities Exchange Act of 1934, as amended, and all requirements of the Securities and Exchange Commission; and (iii) ratifying and confirming his signature as it may be signed by theattorney-in-fact to the Form 10-K and any related amendments and/or supplements. 

Dated this 28th day of February, 2007. 

 
/s/ James B. WigdaleJames B. Wigdale