To provide a diaper an enough ability to absorb urine, to improve its smoothness to put legs inside especially in case of a underpants-type diaper, and to increase its ability to fit around legs.

In a paper diaper, an absorptive element 13 which is mainly made of a cotton-like pulp and has a constricted part 13a of which both side rims around the place where a leg is put in are constricted inward and an absorptive body AB, which consists of a crape paper in which the absorptive element 13 is comprised, are set between a liquid permeable sheet and a liquid impermeable sheet. The crepe paper consists of a crepe paper 14A for an upper layer that has an upper flap part, which extends toward both the outside beyond the upper surface of the absorptive element 13, and the side rim of a part that is not constricted and a crepe paper 14B for a lower layer that has an lower flap part, which extends toward both the outside beyond the lower surface of the absorptive element 13 and the side rim of a part that is not constricted, and a folding part to be top of the above-mentioned upper flap part by being folded from the extended end.