An aluminum brazing sheet has a multilayer structure of two or more layers of at least a core material and a brazing material, wherein an Al—Si—Mg—Bi-based brazing material containing, by mass %, 0.01% to 2.0% of Mg, 1.5% to 14.0% of Si, and 0.005% to 1.5% of Bi is clad on one surface or both surfaces of the core material to be located at an outermost surface of the aluminum brazing sheet, in the Al—Si—Mg—Bi based brazing material, there are more than 10 Mg—Bi-based compounds having a diameter of 0.01 μm or more and less than 5.0 μm when observed in a surface layer plane direction and there are less than 2 Mg—Bi-based compounds having a diameter of 5.0 μm or more, and in the brazing material, there are less than 5 Bi particles having a diameter of 5.0 μm or more when observed in the surface layer plane direction.