A radiation image storage panel having a stimulable phosphor layer and a light-reflecting layer provided thereon, wherein the phosphor layer scatters both of a stimulating light and a stimulated emission emitted by the phosphor layer with a scattering length of 5 to 20 .mu.m and said light-reflecting layer scatters a stimulating light with a scattering length of 5 .mu.m or less is favorably employable for giving a reproduced radiation image having good quality.