To provide a disposable diaper capable of informing the urination clearly and excellently in the appearance.

The disposable diaper 1 has an absorbent body 4 disposed between a liquid-permeable inner sheet 3 and an impermeable and translucent outer sheet 2. A pattern 17 is formed on the inner side surface of the outer sheet 2 in contact with the absorbent body 4 in mixing ink in which an ink not to be changed when brought into contact with moisture and an ink to be changed when brought into contact with moisture are mixed.