BATHTUB

PROBLEM TO BE SOLVED: To provide a bathtub without the need of detaching a pillow for the bathtub even in various bathing postures and even at the time of putting on a bath lid. SOLUTION: The bathtub is formed such that a gradient when the bathtub bottom surface of an abutting surface where the rear head part of a bather is to be positioned at the time of bathing is turned to a reference surface is gentler than the gradient of a surface to which the back of the bather is to be abutted, and a gently formed surface is turned to an attaching surface where the pillow for the bathtub can be disposed. Thus, the pillow for the bathtub can be easily installed when the bather bathes comfortably. In the state of installing the pillow for the bathtub, since it is installed so as to be lower than the rim surface of the bathtub, the bath lid is put on with the pillow for the bathtub kept installed to the bathtub and the need of detaching the pillow for the bathtub every time is eliminated. The need of preparing the bath lid matched with the shape of the pillow for the bathtub is eliminated as well. COPYRIGHT: (C)2006,JPO&NCIPI