PURPOSE: To suppress the formation of the brittle alloy layer of a joint boundary and to make sufficient improvement in joining strength by using a brazing material consisting of an Al-Si-high-Zn system as a brazing material and executing a brazing at the specific temp.

CONSTITUTION: Firstly, the brazing material 3 consisting of the Al-Si-high-Zn system is used and, therefore, only the m.p. of the brazing material is lowered while a good brazing property is maintained. Since Zn of a high concn. is incorporated into the brazing material, the wettability with an iron material 1 is good and the good joining is possible. The brazing is executed at ≤570°C by lowering the m.p. of the brazing material 3 while such brazing property is assured and, therefore, the formation of the brittle alloy layer of an FeAl3 system at the joint boundary of the iron material 1 and an aluminum material 2 is suppressed or eliminated. The degradation in the joint strength of both members by the presence of the alloy layer is consequently prevented and the brazed parts having the excellent strength are provided.