PROBLEM TO BE SOLVED: To provide a disposable diaper which is improved in wearability for a wearer even in a dark place to improve leakage of egesta.SOLUTION: A disposable diaper 1 comprises a pair of back side flap part 20A, 20B extending to either direction of width direction outer sides and a pair of fastening tape 51, 52 for fastening a front girth area FA and a back girth area BA. The pair of fastening tape 51, 52 are provided with a first color region C1 colored with a first color. A cover sheet 132 covering an absorbent core 131 is provided with a second color region C2 colored with a second color. A front end in a fore-and-aft direction of the second color region C2 is positioned in the front girth area FA. The first color region C1 and the second color region C2 are arranged symmetrically with a width direction center line WCL as a center axis. The first color and the second color are colors whose peaks of reflectance in a reflectance ratio curve fall within a range of a wave length of 400-650 nm.
