Coelichneumon cyaniventris is a species of wasp belonging to the family Ichneumonidae.

The species was first described by Constantin Wesmael in 1859.

[2] Coelichneumon cyaniventris can reach a length of 12–15 millimetres (0.47–0.59 in) in males, of 14–15 millimetres (0.55–0.59 in) in females.

Adults can be found from June to September.

[3] This species can be found in Austria, Belgium, Czechoslovakia, Finland, France, Germany, Hungary, Ireland, Italy, Japan, Korea, Latvia, Luxembourg, Netherlands, Poland, Romania, Russia, Spain, Switzerland, Ukraine and the United Kingdom.