A free space optics communication apparatus which performs optical axis
correction with high accuracy is disclosed. The free space optics
communication apparatus of the present invention includes a first light
receiving element and a second light receiving element, a light
converging optical system which converges a light flux incident from the
outside to form a spot of the light flux on each of light receiving
surfaces of the first and second light receiving elements, and
information producing section which combines outputs from the first and
second light receiving elements to produce information on positions of
the spots. The spots formed on the light receiving surfaces of the first
and second light receiving elements have a point-symmetrical
relationship.