This disposable diaper (10) has a crotch stretch section (200) formed at a position at which said crotch stretch section (200) overlaps an absorbent body (40) in a crotch region (25). Said crotch stretch section (200) is formed so as to straddle an imaginary product centerline (VLT) and overlaps a fold-in-half line (FL). An imaginary crotch centerline (VLC) is provided forwards of the imaginary product centerline (VLT), and the fold-in-half line (FL) is provided rearwards of the imaginary product centerline (VLT).