Package for optical module

A package for an optical module, having such a strong construction as to be able to prevent occurrence of warping due to a stress acting thereon, and capable of restraining displacement of an optical fiber fixedly attached to a pipe, and displacement of optical components mounted on a bottom plate so that misalignment of the optical axis is prevented. The package for the optical module is provided with the bottom plate with the optical components mounted thereon, a package frame having the shape of a cylinder, fixedly mounted on the bottom plate, and disposed around the periphery of a mount for the optical components, a pipe fixedly attached to the package frame, and cutting through a predetermined region of the external circumferential surface of the package frame such that one of the extremities of the pipe is projected outwardly, and the optical fiber fixedly attached to the projected extremity of the pipe, thickness of the bottom plate being increased in a region along the internal circumferential surface of the package frame except the mount for the optical components.