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 μm and said light-reflecting layer scatters a stimulating light with a scattering length of 5 μm or less is favorably employable for giving a reproduced radiation image having good quality.