The 2003 Superstock European Championship was the fifth season of the FIM Superstock championship. The FIM Superstock European Championship followed the same calendar as the Superbike World Championship, missing out the none European rounds of the championship. Starting on 2 March in Circuit Ricardo Tormo and ending on 19 October in Circuit de Nevers Magny-Cours.
Michel Fabrizio won the title after beating closest rival Lorenzo Lanzi.