To provide a photovoltaic power generator capable of efficiently ensuring a constant amount of photovoltaic power generation even during time of day when photovoltaic energy is low.

A photovoltaic power generator 1 comprises: a plurality of solar cell panels 2; a plurality of sunlight reflection plates 4 on which sunlight is reflected so as to be projected on the solar cell panels 2; a reflection plate drive unit 5 which changes the angle of reflection surfaces of the sunlight reflection plates 4; a tilt control unit 7 which drives the reflection plate drive unit 5 in conjunction with the solar azimuth, thereby controlling the tilt of the sunlight reflection plates 4; and a power generation mode control unit 8 which drives the reflection plate drive unit 5 to select between a first power generation mode for causing the sunlight reflection plates 4 to project the sunlight on each of the plurality of solar cell panels 2, and a second power generation mode for intensively projecting the sunlight on a specific one of the solar cell panels 2.