PROBLEM TO BE SOLVED: To increase light resistance of a disposable diaper which includes an excretion indicator enabling the presence or absence of discharge of urine and the like to be visually recognized from the outside by coloration.SOLUTION: A liquid-impermeable sheet 11 includes the clear and colorless indicator 80 which uses a leuco dye as a color former and which contains an ultraviolet absorber. A developer 81 for making the indicator 80 develop a color is applied to a packaging sheet 58. The developer 81 is dissolved in an excreted liquid and brought into contact with the indicator 80 together with the excreted liquid so that the indicator 80 can develop the color.
