Coelichneumon cyaniventris is a species of wasp belonging to the family Ichneumonidae. The species was first described by Constantin Wesmael in 1859.
Coelichneumon cyaniventris can reach a length of in males, of in females. Adults can be found from June to September.
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.