Martin Frey (7 December 1904 – 5 November 1971) was a German politician of the Christian Democratic Union (CDU) and former member of the German Bundestag.
Frey was first elected to the German Bundestag in 1949. In the constituency of Geldern-Kleve, he received 60.0% of the valid votes cast and thus entered parliament as a directly elected member. He was not a direct candidate in the next Bundestag election in 1953 and was not elected via the state list. From 1957 to 1969 he was again a member of the Bundestag, where he now always entered via his party's North Rhine-Westphalian state list.