In order to realize a transparent solar cell module with a high design freedom, a solar cell module (10) includes a light guide plate (1) and a solar cell element (2). The light guide plate (1) includes, on its back surface opposite to its light entry surface, traveling direction changing sections (11) for changing a traveling direction of light incident via the light entry surface. Each of the traveling direction changing sections (11) includes a first inclined surface (11a) for reflecting the light incident via the light entry surface and a second inclined surface (11b). The solar cell element (2) is provided on, among intersecting surfaces which intersect with the light entry surface of the light guide plate (1), an end face that light reflected by the first inclined surface (11a) reaches.