A semiconductor light-receiving module includes a semiconductor light-receiving
element and an incident light direction device. The semiconductor light-receiving
element includes a substrate, at least a light absorbing layer and an upper cladding
layer formed sequentially on the substrate, a light incident facet formed at least
at one facet of the substrate and the light absorbing layer, and electrodes which
output an electric signal generated by absorption of the light entering from the
light incident facet in the light absorbing layer. The incident light direction
device directs to irradiate the light obliquely to the light incident facet of
the semiconductor light-receiving element, and to cause at least part of the light
to irradiate the light absorbing layer at the light incident facet.
