PROBLEM TO BE SOLVED: To provide a diaper auxiliary tool capable of preventing leakage of watery feces or urine to a back in use of a diaper.SOLUTION: When a diaper is used, for preventing leakage of watery feces or urine to a back, a material having water absorption similar to that of the diaper is rolled into a slender cylinder shape for forming a pad, the pad is attached to a waist part of the diaper with a double side tape.SELECTED DRAWING: Figure 4【課題】オムツ使用時ゆるい便や尿の背中漏れを防ぐことができるオムツ補助具を得ること。【解決手段】オムツ使用時、背中からゆるい便や尿が漏れることを防止するため、オムツと同じ吸水性のある素材を使用し、それを細長い筒状に丸めたパッドをオムツの腰の部分に両面テープにて装着する。【選択図】図4