An optical communication module, comprising: a photoelectric conversion device that is provided with a photoelectric conversion unit and a connector (21, 21a-21d) on one surface of the photoelectric conversion device, wherein the photoelectric conversion unit performs a photoelectric conversion from an optical signal to an electrical signal or from an electrical signal to an optical signal with receiving or emitting light, and the connector (21, 21a-21d) connects the photoelectric conversion device to another device; an electric conductor (30, 30a-30d) that is connected to the connector (21, 21a-21d) of the photoelectric conversion device and is provided with an optical pass portion for passing light toward the photoelectric conversion unit of the connected photoelectric conversion device; a transparency maintaining unit that passes light, and supports the electric conductor (30, 30a-30d), and whose portion connected to the photoelectric conversion device is exposed; a lens integrally formed on an upper surface of the transparency maintaining unit; another lens integrally formed on a lower surface of the transparency maintaining unit; and a cylindrical portion that protrudes to surround the another lens; wherein the photoelectric conversion device is connected to an exposed portion of the electric conductor (30, 30a-30d), the photoelectric conversion unit is opposed to one of the lenses (14, 15) formed on the transparency maintaining unit, a transmission of an optical signal is performed through the lenses (14, 15) formed on the transparency maintaining unit and the optical pass portion of the electric conductor (30, 30a-30d), the cylindrical portion internally fits a communication line for performing an optical communication, the photoelectric conversion device performs a transmission of an optical signal through an inside of the cylindrical portion, the lenses (14, 15) of the transparency maintaining unit, and the optical pass portion of the electric conductor (30, 30a-30d), and a center of the lens substantially matches to a center of the photoelectric conversion unit of the photoelectric device, and a center of the another lens substantially matches to a center of the cylindrical portion. a photoelectric conversion device that is provided with a photoelectric conversion unit and a connector (21, 21a-21d) on one surface of the photoelectric conversion device, wherein the photoelectric conversion unit performs a photoelectric conversion from an optical signal to an electrical signal or from an electrical signal to an optical signal with receiving or emitting light, and the connector (21, 21a-21d) connects the photoelectric conversion device to another device; an electric conductor (30, 30a-30d) that is connected to the connector (21, 21a-21d) of the photoelectric conversion device and is provided with an optical pass portion for passing light toward the photoelectric conversion unit of the connected photoelectric conversion device; a transparency maintaining unit that passes light, and supports the electric conductor (30, 30a-30d), and whose portion connected to the photoelectric conversion device is exposed; a lens integrally formed on an upper surface of the transparency maintaining unit; another lens integrally formed on a lower surface of the transparency maintaining unit; and a cylindrical portion that protrudes to surround the another lens; wherein the photoelectric conversion device is connected to an exposed portion of the electric conductor (30, 30a-30d), the photoelectric conversion unit is opposed to one of the lenses (14, 15) formed on the transparency maintaining unit, a transmission of an optical signal is performed through the lenses (14, 15) formed on the transparency maintaining unit and the optical pass portion of the electric conductor (30, 30a-30d), the cylindrical portion internally fits a communication line for performing an optical communication, the photoelectric conversion device performs a transmission of an optical signal through an inside of the cylindrical portion, the lenses (14, 15) of the transparency maintaining unit, and the optical pass portion of the electric conductor (30, 30a-30d), and a center of the lens substantially matches to a center of the photoelectric conversion unit of the photoelectric device, and a center of the another lens substantially matches to a center of the cylindrical portion.