A connector holder fixes an optical connector assembled at a leading end
of an optical fiber to an optical module having a light input/output end
so that the optical fiber and the light input/output end is optically
connected. The connector holder is provided with a holding section for
storing at least a part of the optical connector, and a cover section
attached to the holding section to be freely opened and closed. The cover
section is provided with a cover section main body, and a pressing
section which presses the optical connector toward the optical module.