IN A DISPOSABLE DIAPER (10), A COVERING SHEET (40B) IS CONFIGURED TO OVERLAP AT A NON-SKIN CONTACT SURFACE SIDE (S1) OF AN ABSORBENT CORE (40A)； AT AN OVERLAP SITE (A) OF A COVERING SHEET, BY WAY OF ADHESIVE (1), AN END (41E) OF AN INSIDE SHEET (41) AND AN END (42E) OF AN OUTSIDE SHEET (42) ARE CONFIGURED TO BE JOINED WITH EACH OTHER, AND AN END OF THE OUTSIDE SHEET AND THE INSIDE SHEET ARE CONFIGURED TO BE JOINED WITH EACH OTHER； BETWEEN REGIONS IN WHICH THE ADHESIVE IS APPLIED, A NON-JOINT REGION (B) IN WHICH THE INSIDE SHEET AND THE OUTSIDE SHEET ARE NOT JOINED WITH EACH OTHER IS CONFIGURED TO EXTEND IN A PRODUCT LONGITUDINAL DIRECTION (L)； AND AN INDICATOR (600) IS PROVIDED IN THE NON-JOINT REGION. FIG. 3
