To provide a tape type diaper which can be put on in place even when there is poor visibility like at night or others by allowing a caregiver to recognize the center line thereof, and which prevents bedsores or helps them get better.

This tape type diaper 1, comprising an absorber 22, a top sheet 18 which is disposed to cover the front surface of the absorber 22 and at least partly made of liquid-permeable material, and a back sheet 20 which is disposed to cover the back surface of the absorber 22 and made of liquid-impermeable material, is made up of a front panel 2, a crotch part 4, a back panel 6, and adhesive tapes 10 extending from both right and left edges of the back panel 6 to attach the back panel 6 to the front panel 2. This diaper is also provided with a ridge-like member 15 disposed between the absorber 22 and the back sheet 20, or an outermost sheet 61 on the back side of the absorber 22, along the middle line in the diaper width direction.