PURPOSE: To allow the fluxless brazing in the atm. by using a shape memory alloy material by combining this material with aluminum alloy joint members to generate a relative slip in the brazing part of the joint members.

CONSTITUTION: A brazing material is previously stuck to the aluminum alloy joint members 1, 2 and is held in the state of joining at the time of forming the joint of these members. The shape memory alloy material 4 which is deformed at a brazing temp. is combined with this joint part and the relative slip is generated in the brazing part of the two joint members 1, 2 at the time of brazing. The fluxless brazing of the aluminum alloy in the atm. is possible in this way and the low-cost brazing without using costly vacuum equipment and inert gas is executed.