Provided is the pants-type absorbent article for which damage during wearing motions can be suppressed. The pants-type absorbent article (1) comprises: a front waist region (S1)； a rear waist region (S2)； a crotch region(S3)； a waist opening (8) defined by the front waist region and the rear waist region and disposed to surround a waist of the wearer； an external topsheet (70F, 70R) provided on at least one of the front waist region and the rear waist region； and an external backsheet (80F, 80R) bonded to the external topsheet. The external backsheet has a folded-back portion folded back at the waist opening, the folded-back portion extending beyond the external topsheet toward to the waist opening (8). A reinforcing sheet (200A, 200B) is provided to extend in a transverse direction orthogonally crossing the front-back direction and to overlap at least part of the folded-back portion. The reinforcing sheet has a length in the front-back direction (L) longer than a length of the folded-back portion in the front-back direction (L).
