Joachim Jochen Büchner (8 April 1905 – 22 February 1978) was a German sprint runner who competed at two Olympic Games.

[1] Büchner finished second behind Guy Butler in the 220 yards event at the 1926 AAA Championships.

[2][3] At the 1928 Summer Olympics in Amsterdam, he won a bronze medal in the 400 metres event.

Four years later, he failed to reach the 400 metres final at the next Olympics, and finished in fourth place with the German 4 × 400 m relay team.

After retiring from competitions, he worked at ASV Köln, first as athletics coach (1947–1950), then treasurer (1962–1969) and later as president (1969–1977).