Optical module and optical transmission method

A optical transmission method comprising:

• mounting an optical device which is a light emitting device emitting an emitted light or a light receiving device receiving a received light on a first surface of an optical device mounting board including the first surface, a second surface on a reverse side of the first surface, and a first light transparent part allowing the emitted light traveling in a direction from the first surface to the second surface and the received light traveling in a direction from the second surface to the first surface to pass through the first transparent part;
• connecting a first terminal mounted on a surface except the first surface of the optical device mounting board with a second terminal of a component mounted on the first surface including the optical device;
• transmitting an electric signal through the first terminal joined or contacted with a circuit wiring on a mounting surface of a mounting board;
• and
• transmitting the emitted light traveling in a direction from the second surface to an outside or the received light traveling in a direction from the outside to the second surface through a light transmission medium connected from a side of a rear surface of the mounting surface to the second surface.