Provided is a scintillator plate, including a plurality of scintillator crystals each including a plurality of first phases and a second phase present on a periphery of each of the plurality of first phases, in which the each of the plurality of first phases and the second phase are different from each other in refractive index with respect to scintillation light, the adjacent scintillator crystals are joined to each other through intermediation of an adhesive layer, and at least a part of an extension line of a center axis of the each of the plurality of first phases of the adjacent scintillator crystals passes through the adhesive layer.