An absorbent article having an absorbent pad and a waist band across which the absorbent pad is attached, wherein the absorbent pad includes: a liquid pervious top sheet; a liquid impervious back sheet; an absorbent body extending longitudinally between the liquid pervious top sheet and the liquid impervious back sheet at least from a crotch portion to a back-side portion; and an outer sheet on an external surface of the liquid impervious back sheet, and wherein engagement members with indications of attachment positions are arranged at both corners of a ventral-side portion and a back-side portion on an external surface of the outer sheet, the waist band includes: a belt-shaped body having a belt-shaped nonwoven fabric and resilient members arranged in a stretched state along a periphery of the nonwoven fabric; a hook material of a mechanical fastener that is attached to one peripheral end portion of the belt-shaped body, and an engagement portion that is attached to the other peripheral end of the belt-shaped body and is capable of engaging with the hook material; a first ventral-side engagement portion across which the engagement members at the ventral-side portion of the absorbent pad are engaged, and a first back-side engagement portion across which the engagement members at the back-side portion of the absorbent pad are engaged, at a portion of the belt-shaped body opposed to the right iliac bone of a wearer; a second ventral-side engagement portion across which the engagement members at the ventral-side portion of the absorbent pad are engaged, and a second back-side engagement portion across which the engagement members at the back-side portion of the absorbent pad are engaged, at a portion of the belt-shaped body opposed to the left iliac bone of a wearer, and wherein hook materials of mechanical fasteners capable of engaging with the engagement members of the absorbent pad are attached to internal surfaces of the first and second ventral-side engagement portions and the first and second back-side engagement portions, the first and second ventral-side engagement portions and the first and second back-side engagement portions are inclined with respect to the longitudinal direction of the belt-shaped body, and extend beyond a lower waist portion opening edge of the belt-shaped body, fixed portions of the first and second ventral-side engagement portions with the belt shaped body are formed at a position opposed to the iliac bone of a wearer, a shape of the fixed portions is approximate to a substantially triangular shape of iliac bone; a first skin protection portion is provided on the internal surface of the belt-shaped body opposed to the right iliac bone of the wearer, and a second skin protection portion is provided on the internal surface of the belt-shaped body opposed to the left iliac bone of the wearer. a belt-shaped body having a belt-shaped nonwoven fabric and resilient members arranged in a stretched state along a periphery of the nonwoven fabric; a hook material of a mechanical fastener that is attached to one peripheral end portion of the belt-shaped body, and an engagement portion that is attached to the other peripheral end of the belt-shaped body and is capable of engaging with the hook material; a first ventral-side engagement portion across which the engagement members at the ventral-side portion of the absorbent pad are engaged, and a first back-side engagement portion across which the engagement members at the back-side portion of the absorbent pad are engaged, at a portion of the belt-shaped body opposed to the right iliac bone of a wearer; a second ventral-side engagement portion across which the engagement members at the ventral-side portion of the absorbent pad are engaged, and a second back-side engagement portion across which the engagement members at the back-side portion of the absorbent pad are engaged, at a portion of the belt-shaped body opposed to the left iliac bone of a wearer, and wherein hook materials of mechanical fasteners capable of engaging with the engagement members of the absorbent pad are attached to internal surfaces of the first and second ventral-side engagement portions and the first and second back-side engagement portions, the first and second ventral-side engagement portions and the first and second back-side engagement portions are inclined with respect to the longitudinal direction of the belt-shaped body, and extend beyond a lower waist portion opening edge of the belt-shaped body, fixed portions of the first and second ventral-side engagement portions with the belt shaped body are formed at a position opposed to the iliac bone of a wearer, a shape of the fixed portions is approximate to a substantially triangular shape of iliac bone; a first skin protection portion is provided on the internal surface of the belt-shaped body opposed to the right iliac bone of the wearer, and a second skin protection portion is provided on the internal surface of the belt-shaped body opposed to the left iliac bone of the wearer.