Professor Mirosław Mariusz Piotrowski (born on 9 January 1966 in Zielona Góra) is an independent Polish politician and Member of the European Parliament. He was originally elected in 2004 with the League of Polish Families, then part of the Independence and Democracy grouping. At the 2009 election, he was re-elected for Law and Justice.
He left Law and Justice in January 2012 and now sits as an independent MEP in the European Conservatives and Reformists group, alongside Law and Justice. He has been rumoured to be interested in joining United Poland: a party founded by fellow former PiS MEP Zbigniew Ziobro that sits in the EFD group.
Piotrowski sits on the European Parliament's Committee on Foreign Affairs. He is a substitute for the Committee on Regional Development and a vice-chair of the Delegation for Relations with Australia and New Zealand.