There is provided a bathtub, including: a bottom surface part； a side surface part surrounding the bottom surface part, extending upward from the bottom surface part, and including a backrest part； a pillow part provided to be movable vertically over a prescribed range along the backrest part； and a water discharger mounted to the pillow part, the water discharger being provided to be movable vertically along the backrest part with the pillow part.
