A semiconductor module including a semiconductor chip having a light receiving device formed at a front thereof and a light permeable cover having a front, a back, and a side. The light permeable cover is disposed opposite to the front of the semiconductor chip such that the front of the semiconductor chip is covered by the back of the light permeable cover. The light permeable cover is provided at the outer circumferential region of the front thereof and at the side thereof with a light shielding layer. It is possible to prevent the incidence of unnecessary light from the side of the light permeable cover of a CSP and to easily adjust the distance between a lens and the front of the semiconductor chip within tolerance.