An optical module device including optical devices 110, a substrate 100 on which the optical devices 110 are disposed, optical fibers 200 that implement optical communications with the optical devices 110, an optical bench 300 to which the optical fibers 200 are fixed and which implements optical coupling between the optical devices 110 and the optical fibers 200, a cover block 400 that covers the optical bench 300 and a copper cable receptacle 500.