PROBLEM TO BE SOLVED: To provide a convenient structure for mounting a backrest of a bathroom chair which has a simple structure on the whole and is capable of being securely and firmly mounted on a seat, and to provide a bathroom chair equipped with the same.SOLUTION: The bathroom chair includes: the seat 2 with a recess 10 on the upper surface in the rear the backrest with a projection to be detachably fitted into the recess 10 a recess groove 11 provided either in the bottom of the projection or in the bottom of the recess 10 and a fitting projection 28 provided either in the other bottom of the recess 10 or of the projection to be fitted into the recess groove 11.COPYRIGHT: (C)2010,JPO&INPIT【課題】全体の構成が簡易で使い勝手が良く、確実且つ強固に座部に取付けることのできる浴室用椅子の背もたれの取付構造及びこれを備えた浴室用椅子を提供する。【解決手段】後部側上面に凹部10が設けられた座部2と、前記凹部10に着脱自在に嵌入される凸状部が設けられた背もたれと、該凸状部の底部又は前記凹部10の底部の何れか一方に設けられる凹溝11と、該凹溝11に嵌合すべく前記凸状部の底部又は前記凹部10の底部の何れか他方に設けられる嵌合凸部28とを備えている。【選択図】図4