A process for recording a radiation image on a radiation image storage panel containing stimulable phosphor particles and then reproducing the radiation image by the double side reading system is favorably performed employing a radiation image storage panel containing stimulable phosphor particles in which the stimulable phosphor particles vary in their mean particle sizes in the depth direction of the storage panel in such manner that the mean particle size on one surface side is smaller than the mean particle size on the other surface side, preferably under the condition that stimulating rays are applied onto the storage panel on the surface side having the phosphor particles of the smaller mean particle size to excite the phosphor particles in the storage panel.