POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints
David G. Andersen, Queena Han, or Ashley Otero with full power of substitution,
as the undersigned's true and lawful attorney-in-fact to:

(1)	execute for and on behalf of the undersigned, in the undersigned's capacity
as an officer and/or director of XBiotech Inc. or any successor thereto (the
"Company"), Forms 3, 4, and 5 in accordance with Section 16(a) of the Securities
Exchange Act of 1934 and the rules thereunder (the "Exchange Act"), Form 144 in
accordance with Rule 144 under the Securities Act of 1933 ("Rule 144") and any
other directly related forms or reports, including, but not limited to, a Form
ID, that the undersigned may be required to file in connection with the
undersigned's ownership,   acquisition or disposition of securities of the
Company;

(2)	do and perform any and all acts for and on behalf of the undersigned, which
may be necessary or desirable to complete and execute any such Form 3, 4 or 5,
Form 144 or other directly related form or report, complete and execute any
amendment or amendments thereto and timely file such form or report 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 of  benefit to,
in the best interest of, or legally required by, the undersigned, it being
understood that the documents executed by such attorney-in-fact on behalf of the
undersigned 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 reasonable discretion.

The undersigned hereby grants 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 specific rights
and powers herein granted, as fully to all intents and purposes as the
undersigned 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
specific rights and powers herein granted. The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with Section 16 of the Exchange Act or
Rule 144.

This Power of Attorney revokes any previous Power of Attorney filed with the
Company for the purposes set forth herein and shall remain in full force and
effect until the undersigned is no longer required to file Forms 3, 4 and 5 with
respect to the undersigned's holdings of and transactions in securities issued
by the Company, unless expressly revoked before that time.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 6 day of September 2019.



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                            Peter Libby