To provide a luminous body measurement apparatus capable of being easily downsized, with which luminance of a luminous body can be measured in a wide range on a measurement sphere. The luminous body measurement apparatus is configured to pivot a first arm and a second arm in a non-inverted posture to obtain luminance data of a sample at a plurality of image pickup positions in a first region of the measurement sphere, and is configured to pivot the first arm and the second arm in an inverted posture to obtain luminance data of the sample at a plurality of image pickup positions in a second region adjacent to the first region, the non-inverted posture being a posture under which a supporting portion is located on one side of an axis as viewed from a holding portion, the inverted posture being a posture under which the supporting portion is located on another side of the axis as viewed from the holding portion.