The light measurement apparatus according to the present invention includes: an integrating sphere; a reference calibration light source body holding unit that is arranged on the integrating sphere and to which a reference calibration light source body is attached; a test light source body holding unit that is arranged on the integrating sphere and to which a test light source body to be measured is attached; a light detection unit that is arranged on the integrating sphere and detects light from the reference calibration light source body and the test light source body; and a control unit that controls lighting of the reference calibration light source body and the test light source body, the light measurement apparatus being configured so that only either one of the reference calibration light source body and the test light source body is able to selectively emit light in the integrating sphere.