PROBLEM TO BE SOLVED: To provide a shorts type disposable diaper in which leakage from its crotch part can be effectively prevented.SOLUTION: A shorts type disposable diaper 100 comprises a front body sheet 32, a back body sheet 36 and an absorption main body 14. One waist opening part 10 and a pair of leg opening parts 12 are respectively formed by jointing side edge parts of the front body sheet 32 and the back body sheet 36 and by partially jointing crotch lower end parts of the front body sheet 32 and the back body sheet 36. The absorption main body 14 is arranged so that a part corresponding to a crotch of the absorption main body 14 is positioned nearer to the waist opening part 10 than a crotch jointing part 8b of crotch lower end parts of the front body sheet 32 and the back body sheet 36 and the part corresponding to the crotch of absorption main body 14 does not contact the crotch jointing part 8b. A part of the absorption main body 14 at the side of its front body is jointed to the front body sheet 32. A part of the absorption main body 14 at the side of its back body is jointed to the back body sheet 36.
