A scintillator plate for radiation comprising a substrate having thereon a phosphor layer comprising CsI and two or more activators ach having a melting point different from a melting point of CsI, wherein each content of the two or more activators is 0.01% or more based on CsI; and the scintillator plate is produced by forming the phosphor layer on the substrate via a vacuum evaporation method using a source material comprising CsI and two or more activators.