Abstract: A prefabricated modular invalid bathroom unit for installation in a room which has a shower seat portion with a shower seat, a shower floor portion adjacent the shower seat portion for draining shower water, an upper shower wall portion detachably mounted on the shower seat portion which performs as a back-splash surround opposite the shower floor portion, and a commode portion for receiving a water closet which is joinable with the shower floor on the opposite side from the shower seat. The shower floor is provided with a door opening for wheelchair access. Water supply pipes and water drain pipes are carried by the shower unit and connected together between modular portions with conventional plumbing connectors, couplers and fittings. Each modular portion is sufficiently short in height to pass through a standard door opening for easy access into the invalid's home and respective rooms of the home.