Abstract: A bath tub cushion for lining one end surface and a portion of a bottom surface of a bath tub includes a back portion having a number of fluid impermeable chambers formed therein. A fluid communication device is disposed in fluid communication with an interior portion of the chambers for inflating and deflating them as necessary. An anti-slip mechanism is disposed on a back surface of the back portion which engages an end of such bath tub to prevent movement during use. A bottom portion extends toward an opposed end of such tub and is connected to a bottom edge of a front portion of such back portion for supporting a person's hips during bathing. There is an additional anti-slip mechanism disposed on a bottom surface of the bottom portion which engages bottom surface of such bath tub for preventing movement of the bottom portion during use.