A radiation image converging panel comprising a support having thereon a stimulable
phosphor layer produced by a vapor phase method so as to have a thickness of 50
m to 10 mm, wherein the stimulable phosphor layer comprises:(i) a stimulable
phosphor; and (ii) an alkaline metal compound or an alkaline earth metal compound
each having a different crystal structure from the stimulable phosphor, and an
amount of the alkaline metal compound or the alkaline earth metal compound being
10 to 1000 ppm by weight based on the total weight of the stimulable phosphor layer.