The 7.5 cm PaK 40 (7.5 cm Panzerabwehrkanone 40) was a German 7.5 cm anti-tank gun developed in 1939-1941 by Rheinmetall and used during the Second World War.

Priority of the project was initially low, but Operation Barbarossa in 1941 and the appearance of heavily armoured Russian tanks like the KV-1, increased the priority. The first guns were delivered in November 1941. By 1943 PaK 40 formed the bulk of the German anti-tank artillery.

About 23,500 pieces were produced, and about 6,000 more were used to arm tank destroyers.

Technical data:
- dimensions - 62 x 36 mm
- number of details - 31