Klaus-Dieter Bieler (born 5 January 1949) is a former German track and field athlete, who competed for West Germany in the 1976 Summer Olympics, taking part in the men's 100 metres and 4 × 100 metres relay events.

[1] Bieler competed for the clubs Eintracht Braunschweig and TV Wattenscheid.

[2] His biggest success was winning the bronze medal in the 100 metres event at the 1974 European Athletics Championships.

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