The invention relates to a sanitary installation in small spaces, particularly in motorhomes, airplanes, yachts, or tiny houses, with at least one
shower room and an adjacent sleeping area (
bed), wherein, when the
shower area is not in use for the
bed, a part extending the adjacent sleeping area is inserted into the
shower area, particularly by
insertion, folding, pivoting, or the like, or the adjacent sleeping area is moved into the shower area, so that the entire required
bed area is available, and wherein the
toilet area is directly adjacent to the shower room and access to the shower area is via the
toilet area, wherein the shower room has a closable opening in the shower wall at least in the direction of the bed area, the height of which is to be at least such asthat, in addition to the height of the
lying surface, the necessary freedom of movement for the body part of the person
lying on it is given, and wherein the opening in the horizontal cross-section is L-shaped, corner-shaped, semicircular, or elliptical.