The Privilege of Parliament Act 1603 or the Parliamentary Privilege Act 1603 (1 Jas. 1. c. 13) is an act of the Parliament of England. It was passed following the imprisonment of Thomas Shirley MP for debt in the Fleet Prison.
This act was partly in force in Great Britain at the end of 2010.
This act was retained for the Republic of Ireland by section 2(2)(a) of, and part 2 of schedule 1 to, the Statute Law Revision Act 2007.