Method of joining an aluminum alloy material

To provide a novel bonding method for good bonding and high reliability in without furnace using a joining member. SOLUTION aluminum alloy material as one of the workpieces, one of the aluminum alloy material and the pure aluminum material as the other member to be joined, in a method of joining the two workpieces, and one member to be joined aluminum alloy material of the other member to be joined are both Mg content is restricted to 0.5 mass%, the liquid to be generated within that aluminum alloy material for one of the total weight of the aluminum alloy material is bonded members at the temperature at which the ratio of the mass of the phase is 35% less than 5% or less, and wherein the joining in a state where fluoride or flux of chloride system is applied to the junction member in a non-oxidizing atmosphere furnace method of joining an aluminum alloy material. .FIELD 1