POWER OF ATTORNEY

	I, Paul W. Schaffer hereby authorize and designate each of W. Morgan
 Burns, Joshua L. Colburn and Andrew E. Gustafson signing singly, as my true
 and lawful attorney-in-fact to:

	(1)	execute for and on my behalf, in my capacity as an officer and/or
 director of Sun BioPharma, Inc. (the "Company"), Form ID or Forms 3, 4 and 5
 in accordance with Section 16(a) of the Securities Exchange Act of 1934 (the
 "Exchange Act") and the rules and regulations promulgated thereunder and other
 forms or reports on my behalf as may be required to be filed in connection
 with my ownership, acquisition, or disposition of securities of the Company,
 including Form 144 and Schedule 13D or Schedule 13G;

	(2)	do and perform any and all acts for and on my behalf which may be
 necessary or desirable to complete and execute any such Form ID, Forms 3, 4 or
 5, Form 144, Schedule 13D or Schedule 13G  and timely file such form with the
 Securities and Exchange Commission and any stock exchange or similar
 authority; and

	(3)	take any other action of any type whatsoever in connection with the
 foregoing which, in the opinion of such attorney-in-fact, may be to my
 benefit, in my best interest, or legally required of me, it being understood
 that the statements executed by such attorney-in-fact on my behalf pursuant to
 this Power of Attorney shall be in such form and shall contain such terms and
 conditions as such attorney-in-fact may approve in such attorney-in-fact's
 discretion.

	I hereby further grant to each such attorney-in-fact full power and
 authority to do and perform any and every act and thing whatsoever requisite,
 necessary, or proper to be done in the exercise of any of the rights and
 powers herein granted, as fully to all intents and purposes as I might or
 could do if personally present, with full power of substitution or revocation,
 hereby ratifying and confirming all that such attorney-in-fact, or such
 attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
 done by virtue of this Power of Attorney and the rights and powers herein
 granted.  I hereby acknowledge that the foregoing attorneys-in-fact, in
 serving in such capacity at my request, are not assuming, nor is the Company
 assuming, any of my responsibilities to comply with Section 16 of the Exchange
 Act.

       This Power of Attorney shall remain in full force and effect until I am
 no longer required to file Form ID or Forms 3, 4 and 5 with respect to my
 holdings of and transactions in securities issued by the Company, unless
 earlier revoked by me in a signed writing delivered to the foregoing
 attorneys-in-fact.  Notwithstanding the foregoing, if any such attorney-in-
fact hereafter ceases to be at least one of the following:  (i) a partner of
 Faegre Baker Daniels LLP or (ii) an employee of Faegre Baker Daniels LLP, then
 this Power of Attorney shall be automatically revoked solely as to such
 individual, immediately upon such cessation, without any further action on my
 part.
	I hereby revoke all previous Powers of Attorney that have been granted by
 me in connection with my reporting obligations under Section 16 of the
 Exchange Act with respect to my holdings of and transactions in securities
 issued by the Company.

	IN WITNESS WHEREOF, I have caused this Power of Attorney to be duly
 executed as of this 30th day of August, 2015.


						/s/ Paul W. Schaffer