Calosoma cyanescens is a species of ground beetle in the subfamily of Carabinae. It was described by Victor Motschulsky in 1859. This species is found in north-eastern China, North Korea, South Korea, northern Japan (Honshu and Hokkaido) and Russia (Siberia).
Adults reach a length of 16-28 mm.
This species is often treated as a subspecies of Calosoma inquisitor.