Transmitter/receiver for optical parallel transmission and board for optical module

An optical parallel transmission receiver with a plurality of light-receiving elements comprising:

• a pair of guide pins;
• optical fibers each corresponding to one of said light-receiving elements, respectively;
• light-receiving element holding means, having a pair of guide-pin holes for holding one end of corresponding said guide pins in parallel, for holding said plurality of light-receiving elements between said guide-pin holes;
• and
• fiber holding means penetrated by said pair of guide pins so as to close contact with said light-receiving element holding means and holding said plurality of optical fibers throughout their length between said pair of guide pins, wherein said optical fibers are optically coupled to corresponding said light-receiving elements and their input end faces are aligned at a predetermined interval between said guide pins on a connecting end face of said fiber holding means.