A concentrator photovoltaic module 1M includes a vessel-shaped housing 11 composed of a metal and a flexible printed wiring board 12 provided so as to be in contact with an inner surface of the housing 11. The flexible printed wiring board 12 includes an insulating layer 124, an insulating substrate 121a, a pattern 121b, a plurality of power generation elements 122, and an insulting layer 126. The insulating layer 124 is in contact with a bottom surface 11a of the housing 11. The insulating substrate 121a is provided on the insulating layer 124 and has flexibility. The pattern 121b is composed of a conductor and is provided on the insulating substrate 121a. The plurality of power generation elements 122 are mounted on the pattern 121b. The insulating layer 126 is provided so as to cover an entire surface of the pattern 121b except for portions where the power generation elements 122 are mounted.