To provide a diaper cover that hardly slips from a combinedly used paper diaper or cloth diaper and can be manufactured from one base material.

This diaper cover is constituted in such a way that elliptic crotch sections 2 are rapped from both sides of a rectangular base material 1 for the main body of the cover so that the major axes of the sections 2 may become parallel to the lengthwise direction of the material 1 and folded sections for preventing lateral leakage each having one of the crotch sections 2 formed in half-elliptic shapes are formed on both sides by folding both side-sections of the material 1 inward along folding lines 3 drawn in straight lines so as to include the major axes of the sections 2. Then bag-like gather sections 4 are formed from the front body parts 6 to the rear body parts 5 of the folded sections by sewing rubber on the inner and outer edge sections of the folded sections and ornamental waist sections 7 are attached to the front and rear body parts 6 and 5.