A high strength aluminum alloy brazing sheet by a solid solution strengthening effect, comprising: a core material composed of an aluminum alloy; and a filler material cladded on at least one surface of said core material and composed of an Al/Si-based alloy, characterized by the fact: that said core material is the aluminum alloy which consists of Si falling within a range of 0.05-1.2 mass %, Fe falling a range of 0.05-1.0 mass %, Cu falling within a range of 0.05-1.2 mass %, Mn falling within a range of 0.6-1.8 mass %, optionally Mg falling within a range of 0.05-0.5 mass %, optionally Ti falling within a range of 0.05-0.3 mass %, optionally Zr falling within a range of 0.05-0.3 mass %, optionally Cr falling within a range of 0.05-0.3 mass %, and optionally V falling within a range of 0.05-0.3 mass %, the balance being Al and inevitable impurities; that said filler material is the aluminum alloy which consists of Si falling within a range of 2.5-13.0 mass %, Fe falling within a range of 0.05-1.0 mass %, and optionally Zn falling within a range of 0.3-5.5 mass %, the balance being Al and inevitable impurities; that an area percentage, at which an arbitrary cross-section of said core material before a brazing process is occupied with intermetallic compounds having a size falling within a range of 0.2-0.5 μm, is at most 5 %; and that a solid solution amount of Mn is at least 0.2 mass % in said core material after the brazing process. a core material composed of an aluminum alloy; and a filler material cladded on at least one surface of said core material and composed of an Al/Si-based alloy, characterized by the fact: that said core material is the aluminum alloy which consists of Si falling within a range of 0.05-1.2 mass %, Fe falling a range of 0.05-1.0 mass %, Cu falling within a range of 0.05-1.2 mass %, Mn falling within a range of 0.6-1.8 mass %, optionally Mg falling within a range of 0.05-0.5 mass %, optionally Ti falling within a range of 0.05-0.3 mass %, optionally Zr falling within a range of 0.05-0.3 mass %, optionally Cr falling within a range of 0.05-0.3 mass %, and optionally V falling within a range of 0.05-0.3 mass %, the balance being Al and inevitable impurities; that said filler material is the aluminum alloy which consists of Si falling within a range of 2.5-13.0 mass %, Fe falling within a range of 0.05-1.0 mass %, and optionally Zn falling within a range of 0.3-5.5 mass %, the balance being Al and inevitable impurities; that an area percentage, at which an arbitrary cross-section of said core material before a brazing process is occupied with intermetallic compounds having a size falling within a range of 0.2-0.5 μm, is at most 5 %; and that a solid solution amount of Mn is at least 0.2 mass % in said core material after the brazing process. that said core material is the aluminum alloy which consists of Si falling within a range of 0.05-1.2 mass %, Fe falling a range of 0.05-1.0 mass %, Cu falling within a range of 0.05-1.2 mass %, Mn falling within a range of 0.6-1.8 mass %, optionally Mg falling within a range of 0.05-0.5 mass %, optionally Ti falling within a range of 0.05-0.3 mass %, optionally Zr falling within a range of 0.05-0.3 mass %, optionally Cr falling within a range of 0.05-0.3 mass %, and optionally V falling within a range of 0.05-0.3 mass %, the balance being Al and inevitable impurities; that said filler material is the aluminum alloy which consists of Si falling within a range of 2.5-13.0 mass %, Fe falling within a range of 0.05-1.0 mass %, and optionally Zn falling within a range of 0.3-5.5 mass %, the balance being Al and inevitable impurities; that an area percentage, at which an arbitrary cross-section of said core material before a brazing process is occupied with intermetallic compounds having a size falling within a range of 0.2-0.5 μm, is at most 5 %; and that a solid solution amount of Mn is at least 0.2 mass % in said core material after the brazing process.