RAINWATER STORAGE TYPE PAVEMENT BLOCK

PROBLEM TO BE SOLVED: To provide a rainwater storage type pavement block capable of preventing decline in infiltration efficiency of rainwater and suppressing unevenness and looseness.SOLUTION: A projected part 11 is formed on one fitting side face 3, a recessed groove 12 is formed on the other fitting side face 4, a horizontal joint holding projection thread 21 and a vertical joint holding projection thread 22 are formed on one non-fitting side face 5, the vertical joint holding projection thread 22 is higher than the horizontal joint holding projection thread 21, and joint sand S is filled in a joint sand filling area in a spread state. In the spread state, a gap o is secured between the horizontal joint holding projection thread 21 and the adjacent rainwater storage type pavement block A, the rainwater is made to flow from the gap o and is discharged underground. In the spread state, the projected part 11 is fitted to the recessed groove 12, and a load dispersion performance in a joint part is improved by the joint sand S filled in the joint sand filling area.