The 1st Marine Infantry Regiment () is a French regiment, that inherits from Colonial Infantry. It is one of the oldest regiments of the Troupes de Marine with 2e RIMa, 3e RIMa, 4e RIMa and 1er RAMa, forming the Blue Division during Franco-Prussian war. The current regiment is based in Angoulême, and is actually a light cavalry regiment like the RICM equipped with AMX-10RC and VBL. It was part of the 9th Light Armoured Marine Brigade of the French Army and has been transferred to 3rd Mechanised Brigade since July 2009.