PROBLEM TO BE SOLVED: To provide an excretion aid device that facilitates excretion in a supine position.SOLUTION: An excretion aid device 1 is placed under buttocks of a supine user and is used to lift the buttocks from the back. The excretion aid device 1 includes: a left side thigh supporting part 2 for supporting a thigh on the left side of the user a right side thigh supporting part 3 for supporting the thigh on the right side of the user a left side buttock supporting part 4 for supporting the buttock on the left side of the user, and connected to the left side thigh supporting part 2 and a right side buttock supporting part 5 for supporting the right buttock of the user, and connected to the right side thigh supporting part 3. The left side thigh supporting part 2 and the right side thigh supporting part 3 are formed so that a height of the root side of the thigh becomes higher than the height of the knee side.COPYRIGHT: (C)2014,JPO&INPIT【課題】仰臥位での排泄を容易にする排泄補助具を提供する。【解決手段】仰臥位の使用者の臀部の下に置いて、臀部を背部よりも持ち上げるように用いられる排泄補助具1であって、排泄補助具1は、使用者の左側の大腿部を支える左側大腿支持部2と、使用者の右側の大腿部を支える右側大腿支持部3と、使用者の左側の臀部を支え、左側大腿支持部2に接続して設けられた左側臀部支持部4と、使用者の右側の臀部を支え、右側大腿支持部3に接続して設けられた右側臀部支持部5とを有し、左側大腿支持部2と右側大腿支持部3は大腿部の付け根側の高さが膝側の高さよりも高くなるように形成されている。【選択図】図1