Roger Claessen (27 September 1941 – 3 October 1982) was a Belgian footballer who played as a forward.

He finished as the top scorer of the Belgian League with 20 goals (along with Paul Van Himst) in 1968 while playing for Standard Liège.

Claessen made his international debut on 20 May 1961 in a 2–1 defeat to Switzerland, and he scored.

[2] He played for other teams, like Alemannia Aachen[3] Beerschot and Crossing Schaarbeek[4] before retiring from football in 1974.

This biographical article related to association football in Belgium, about a forward, is a stub.