PURPOSE: To reduce a wiring length by forming each of a plurality of package leads by adjusting any of a length from an edge face, an angle to an edge face and a height from a substrate.

CONSTITUTION: A pillar shaft of light transmit-receive modules 12, 22 formed to a pillar is arranged parallel to a surface of transmit-receive substrates 13, 23. A plurality of package leads 60 attached to project to one edge face of the light transmit-receive modules 12, 22 and an electrode 70 provided on a transmit-receive substrate are connected by a metallic wire 50. Each of a plurality of package leads 60 is formed by adjusting any of a length from an edge face, an angle to an edge face and a height from the transmit-receive substrates 13, 23. Thereby, the package lead 60 and the metallic wire 50 can be attached by reducing a length of the sum thereof.