|Date of birth||27 December 1949|
|Place of birth||Kreuzstraßl, West Germany|
|Height||1.78 m (5 ft 10 in)|
|1968–1970||TSV 1860 München||60||(28)|
|1970–1981||FC Schalke 04||305||(182)|
|1981–1984||1. FC Köln||96||(31)|
|1971||West Germany U-23||2||(2)|
|1990||FC Schalke 04|
|1992||FC Schalke 04|
|* Senior club appearances and goals counted for the domestic league only.
† Appearances (Goals).
He moved from SC Zwiesel to TSV 1860 München in 1968 and made 535 Bundesliga appearances for TSV 1860 München, FC Schalke 04, 1. FC Köln and VfL Bochum. With Schalke 04 he won the German Cup in 1972. Schalke 04 were one of the clubs involved in a bribery scandal in season 1970–71 of the Bundesliga. As one of the players involved, Fischer initially received a ban for life, but this punishment was later reduced to a one-year ban.
In 1976 he was top scorer in the Bundesliga. With 268 goals he ranks second to Gerd Müller in the list of all-time top Bundesliga goalscorers. In 1988 Fischer's club side VfL Bochum made it to the German Cup Final, but Fischer did not feature in the final match. Klaus Fischer ended his career in 1988.
His 182 league goals for Schalke 04 remain a club record.
He made 45 appearances for the Germany national football team from 1977 to 1982 and scored 32 goals (eight headers and 24 with his feet including two bicycle kicks). He appeared in two World Cups and was a World Cup runner-up in Spain in 1982.
Fischer was known particularly for his bicycle kicks, often set up for him by Rüdiger Abramczik. His goal from a bicycle kick in a 4–1 win in a 1977 international match against Switzerland was selected as the Goal of the Year by German television viewers, and would later be voted Goal of the Decade and Goal of the Century. He also scored a famous bicycle kick goal in extra time in the 1982 World Cup semi-finals against France.
He currently runs a football training school.
- DFB-Pokal: 1971–72, 1982–83
- Bundesliga runner-up: 1971–72, 1976–77, 1981–82
- Bundesliga: top scorer 1975–76 (29 goals)
- FIFA World Cup runner-up: 1982
- "Klaus Fischer: "Mr. Fallrückzieher" wird 60" [Klaus Fischer: "Mr. Bicycle Kick" is 60] (in German). reviersport.de. 26 December 2009. Retrieved 26 December 2009.
- "Der Torjäger und die Fallrückzieher: Klaus Fischer feiert 60" [The goalgetter and the bicycle kicks: Klaus Fischer celebrates 60] (in German). schalke04.de. 23 December 2009. Retrieved 26 December 2009.
- Klaus Fischer – FIFA competition record
- "Markenzeichen Fallrückzieher: Klaus Fischer wird 60" (in German). transfermarkt.de. 26 December 2009. Retrieved 26 December 2009.
- "Fußball: Klaus Fischer und kleine Kicker-Träume" (in German). derwesten.de.de. 25 December 2009. Retrieved 26 December 2009.