To provide a light shielding structure of a light shieldable photosensitive material roll which can maintain light shieldability even when the structure receives vibrations and the impact of falling.

The light shielding structure of the light shieldable photosensitive material roll has a photosensitive material roll formed by winding a photosensitive material sheet around a hollow winding core, a pair of light shielding flanges fitted into the hollow section of the photosensitive material roll to shield both flanks in the axial direction of the photosensitive material roll and buffer members fitted into portions of the light shielding flanges to relieve the impact received by the photosensitive material roll, in which annular members are disposed between the light shielding flanges and the buffer members.