Various simple back scrubber-massagers are invented for the shower/bathtub surround. The scrubber-massagers can be made for permanent installation on an existing shower/bathtub surround or they can be made as a built-in feature of a shower/bathtub surround. Basically, the back scrubber-massagers have either one wall or two parallel walls. Both sides of the footing of a wall are curved for easily cleaning. The top of a wall is smooth and with or without texture. For a two-wall configuration, a protrusion along the upper portion of the inner side of each wall is provided to help holding a sponge or towel between the walls.