A portable toilet particularly suited to be a roll-out toilet positions a toilet with its holding tank at a rear wall, a sink at an opposed front wall, a urinal on one of the side walls and an access door through the opposing sidewall to provide access to the enclosure formed by the, front, rear and side walls. By connecting the drain from the sink to the urinal so that the water draining from the sink must pass through the urinal and then pass from the urinal to a toilet holding tank via a drain line connecting the urinal to a toilet holding tank the sink drain water is collected and will tend to wash and thereby clean the urinal.