A disposable diaper has been issued a patent. It comprises an absorber and a top sheet which is disposed to cover an upper surface of the absorber. The top sheet is at least partially formed of a liquid permeable material. A back sheet is formed of a liquid impermeable material and it is disposed to cover a lower surface of the absorber. A skin contact sheet laminated above the top sheet has both a stool passing opening that is capable of passing a stool through and a urine passing opening. The urine/stool separation wall is formed of a discrete breathable water repellent sheet, which is located within a space defined between the skin contact sheet and the top sheet so that the space is separated into a front body part side space and a back body part side space. When the diaper is in a fully relaxed state, a portion of the surface of the top sheet located directly under the stool passing opening is at least partially covered by and in direct contact with a portion of the discrete breathable water repellent sheet defining the urine/stool separation wall to prevent urine present in the absorber from leaking out of the absorber, passing through the top sheet into the back body part side space and contacting stool and in another portion of the surface of the top sheet located directly under the urine passing opening is not covered by any portion of the discrete breathable water repellent sheet of the urine/stool separation wall.