To obtain a portable bath easy to carry providing a bathtub constituted by using a fiber reinforced sheet, a board, a rubber tube, etc., which resist repeated folding and are light in weight and excellent in a heat insulating effect, and a boiler with a cassette gas cylinder or an oil burning cooking stove as a heat source freely detachably.

This both is provided with a bathtub consisting of a rubber bag 1 expanded by injecting air by a bellow, etc., from an air guiding part 3 at the time of using like a rubber swimming float and a rubber boat. In addition, the bath is provided with a boiler part 10 for heating water in a water heating tank 10 by heat generated by using a cassette-type gas cooking stove on the market incorporated with a cassette gas cylinder, the oil burning cooking stove as a heat source. Then, the bathtub and the part 10 are connected to each other through a circulation pipe connector 14 to introduce water the bathtub to the part 10 and hot water heated here is returned into the bathtub to heat the water in the bathtub to a proper temperature.