An effective technique for enhancing ease of mounting a urine absorbing pad on a diaper body is provided in a diaper to be worn by a diaper wearer. The diaper has a urine absorbing pad (120) to be mounted on the diaper body. The urine absorbing pad (120) includes a liquid-permeable sheet (121) provided on a wearers side, a liquid-impermeable sheet (122) provided on a diaper body side, an absorber (123) disposed between the liquid-permeable sheet (121) and the liquid-impermeable sheet (122) laid one on another, and an annular belt (124) formed in a rear end edge region of the urine absorbing pad (120). When the urine absorbing pad is mounted on the diaper body, an insertion piece of the diaper body is inserted into an opening of the belt (124), so that the urine absorbing pad is positioned with respect to the diaper body.
