In a radiation image storage panel composed of a phosphor layer produced by vapor phase deposition, the phosphor layer is composed of an europium activated cesium halide stimulable phosphor and exhibits an ultraviolet light-excited emission spectrum satisfying the condition of:

0S(400-420)0.20

in which S(400-420) represents a ratio of an amount of a light emitted by a luminous component giving an emission peak in the region of 400 to 420 nm based on the total amount of emitted light.