ANTIFREEZING DRAIN HOSE

PROBLEM TO BE SOLVED: To provide an antifreezing drain hose for reducing risk of deteriorating a material of a mating drain pipe by thermal influence, while restraining freezing of drain water by heating of an electric heater.SOLUTION: This antifreezing drain hose 1 drains the drain water. The antifreezing drain hose 1 includes a base end hose part 10, an insertion tip hose part 12 integrally continuously arranged on the forward side of the base end hose part 10, the electric heater 2, and a cylindrical heat insulation layer 3. A heat radiation quantity per unit area and unit time radiated to the outer peripheral side of the heat insulation layer 3 from the electric heater 2 in the insertion tip hose part 12 is set as Qinsert. A heat radiation quantity per unit area and unit time radiated to the outer peripheral side of the heat insulation layer 3 from the electric heater 2 in the base end hose part 10 is set as Qbase. The Qinsert is set smaller than the Qbase.