A shower corner seat assembly is made up of a seat plate and supporting bracket frame. To fit in the corner, the seat is generally triangular like most others, but with the corner tip of the triangle cut away leaving a four-sided shape. Other minor modifications to true triangularity may also be present. The frame follows the contour of the seat and it, too, is formed to match the corner opening of the seat plate, leaving the framework to be more or less “U”-shaped with the arms of the “U” bent inward tending to somewhat follow the sides of the seat plate. Their ends are, in fact, bent even farther inward so they have to be forced or sprung outward to attach the frame to the shower wall. The openness of the frame near the shower corner makes this possible. The seat plate is then attached to it.