To store light of headlights when a car such as a motorcar, etc., passes through and to develop a light storage block having a long light persistance time as well as brightness and persistance time (light persistance time).
A light storage block is so constituted that light storage material 2 alone having aluminate with high purity as main ingredient or mixture mixing the light storage material with glass beads 3 are adhered to necessary positions on the surface course of a block main body. The said manufacturing is so constituted that an adhesive B is applied to a separation sheet A, a light storage sheet C having the light storage material 2 alone or mixture stirring the light storage material 2 and glass beads 3 at a proper ratio is provided, the light storage sheet C is fixed to the insides of necessary positions of forms D in the block, the forms D are filled with concrete E and that the light storage sheet is removed from the forms to eliminate the separation sheet after the completion of the block.
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