This absorbent article, which has a lengthwise direction and a widthwise direction that intersects the lengthwise direction, includes: an absorbent body that is provided along the lengthwise direction and absorbs waste； an abdomen-side band member that is provided along the widthwise direction, and is fixed at the widthwise center thereof to one end of the absorbent body in the lengthwise direction while covering said end from the non-skin-side of the absorbent body； and a back-side band member that is provided along the widthwise direction as a separate member from the abdomen-side band member, and is fixed at the widthwise center thereof to the other end of the absorbent body in the lengthwise direction while covering said other end from the non-skin-side of the absorbent body. Elastic members that are expandable along the widthwise direction are respectively provided to the abdomen-side band member and the back-side band member. The abdomen-side band member includes abdomen-side-band-member side edge sections on both widthwise side edges thereof, the back-side band member includes back-side-band-member side edge sections on both widthwise side edges thereof, and the absorbent article is formed in a cylindrical manner by joining the abdomen-side-band-member side edge sections and the back-side-band-member side edge sections. The absorbent body includes an absorbent core obtained by laminating liquid-absorbent materials, and a liquid-impermeable leakage prevention sheet that covers the absorbent core from the non-skin side of the absorbent core. The absorbent core includes a narrow section between an abdomen-side end section and a back-side end section, with the width of the narrow section in the widthwise direction being narrower than that of the abdomen-side end section and the back-side end section. The positions of the back-side-band-member side edge sections and the narrow section at least partially overlap in the lengthwise direction.
