Piotr Igor Ikonowicz, born on May 14, 1956, in Pruszków near Warsaw) is a Polish politician.

Social Justice Movement was a Polish radical left-wing socialist political party. It was founded by Piotr Ikonowicz on 2 May 2014. and registered on 5 September 2014. The main tenet of the party was to represent the poorest and weakest in Polish society and to fight "against social exclusion, inequality and economic exploitation". The party was active politically and formed electoral lists together with other minor left-wing parties, but it never managed to gain any seats. Amongst others, the party ran together with parties such as Left Together and Labour Union, as well as independently; at the same time, it also worked together with parties such as Samoobrona. It also gathered signatures and submitted draft proposals for anti-privatization and anti-eviction laws. It was deregistered on 6 February 2023.