An optical module (100) set on a substrate for assembling with a fiber (72) and comprises a light signal gathering device (8), a plurality of electrical contacts (2) set on the light signal gathering device (8) and an optoelectronic device (4) soldered to the electrical contacts (2) for receiving the light signals refocused by the light signal gathering device (8) and transferring the light signals to electrical signals, the light signal gathering device (8) includes a resin body (1) and a light signal gathering portion set on the resin body (1) for refocusing light signals.