Photoelectric conversion module

A photoelectric conversion module, comprising:

• a transmission side photoelectric conversion part for converting an electrical signal into an optical signal;
• a first base member on which the transmission side photoelectric conversion part is mounted;
• a transmission side circuit board to a back surface of which a part of a top surface of the first base member is fixed such that the transmission side photoelectric conversion part is mounted on a top surface side of the transmission side circuit board;
• a reception side photoelectric conversion part for converting an optical signal into an electrical signal;
• a second base member on which the reception side photoelectric conversion part is mounted;
• a reception side circuit board to a back surface of which a part of a top surface of the second base member is fixed such that the reception side photoelectric conversion part is mounted on a top surface side of the reception side circuit board;
• and
• a housing,
• wherein the transmission side circuit board and the reception side circuit board are placed such that a back surface of the first base member fixed to the transmission side circuit board is opposite to the housing and a back surface of the second base member fixed to the reception side circuit board is opposite to the housing.