Dieter Müller (né Kaster; 1 April 1954) is a German former professional footballer who played as a forward.

[2] Müller played and scored in the UEFA Euro 1976 final, which West Germany lost on penalties to Czechoslovakia.

He was again in the national team in the 1978 FIFA World Cup, though the campaign ended in disappointment when West Germany, the defending champions, did not qualify for the tournament's final.

FC Köln he set a record for the most goals scored by a player in a single Bundesliga match.

Müller is the son of Heinz Kaster, who played as a defender for FC St. Pauli and Kickers Offenbach in the early 1950s.