The solid scintillator according to the present invention is expressed by the following formula (1): [Formula 1] (M1-x-yGdxCey)3J5O12&emsp；&emsp；(1) (wherein M is at least one element of La and Tb； J is at least one metal selected from the group consisting of Al, Ga, and In； and x and y are such that 0.5&nlE；x&nlE；1 and 0.000001&nlE；y&nlE；0.2). The transmittance of light having a wavelength of 550 nm measured at a thickness of 2 mm is equal to or greater than 40%. The solid scintillator according to the present invention can be manufactured at low cost, has a high light emitting power, and does not release Cd because Cd is not contained.
