There is disclosed an absorbent article including: a main body of a support sheet, a liquid absorbing layer and a liquid-permeable sheet; and leakage preventing side walls provided on two sides of the main body and extending in the longitudinal direction, to have root ends jointed to the surface of the liquid receiving side and to have free ends positioned apart from the surface of the liquid receiving side. Each leakage preventing side wall is formed of at least one side wall sheet to have an inner sheet portion facing the widthwise inner side of the absorbent article and an outer sheet portion facing the widthwise outer side of the absorbent article. The inner sheet portion are provided with holes leading to the inside of the inner and outer sheet portions.