To provide a paper diaper provided with a fastening tape whose adhesion power is not easily lowered by the sticking of a foreign matter or the like to an adhesive surface.

This paper diaper is put on the crotch part of a human body and the fastening tape whose one end part 5 is fixed is provided on both side edge parts of the rear side part of the paper diaper. In the paper diaper worn by freely attachably and detachably adhering the other end part of the fastening tapes to the front side part of the paper diaper, on the adhesion surface of the fastening tape, a recessed secondary adhesion part 9 pushed out by being pressurized from the opposite surface of the adhesive surface and freely attachably and detachably adhered to the surface to be adhered is provided.