A diaper (1) includes an annular waist panel (10) having a longitudinal direction (Y) and a transverse direction (X) and a skin-facing side and a non-skin-facing side and includes an absorbent chassis (30) connected to the annular waist panel (10). The absorbent chassis (30) includes a first sheet (29a), a second sheet (29b), a pair of end flaps (35, 36) extending along opposite ends (31, 32) of the first and second sheets (29a, 29b), respectively, and a pair of side flaps (38) extending along opposite side edges (29c, 29d) of the first and second sheets (29a, 29b), respectively, wherein these side flaps (38) are folded onto the skin-facing side. Linear adhesives (90) serving to bond the first sheet (29a) and the second sheet (29b) to each other continuously extend in the longitudinal direction (Y) from the front end (31) to the rear end (32) of the opposite ends (31, 32) wherein the first sheet (29a), the second sheet (29b) and the linear adhesives (90) cooperate together to define channels (91) opened along one side in the transverse direction (X) and extending in the longitudinal direction (Y).
