The present invention is intended to improve the liquid diffusibility and fit of an absorber having a first slit extending in a front-back direction and second slits continuing laterally from the first slit to the side edges. The foregoing issue is solved by providing one first slit (17) extending in the front-back direction in a width-direction intermediate portion of an absorber (13), providing second slits (18) continuing from each of front end side and back end side of the first slit (17) toward width-direction both sides to the side edges, and providing second slit elastic members (30) to cross in the direction of continuance of the second slits (18) and exert a contraction force in the direction of closing of the second slits (18).
