To provide a built-up broach and its manufacturing method for highly ensuring coaxiality between cutting edges and a grip part of a broach body.

This built-up broach 30 has a broach body 31 having the grip part 1 at the end part; an assembly 35 of hollow cylinder shape fittingly fixed to the broach body; and the cutting edges 18 formed of cemented carbide and arranged in dimensional order at the outer periphery 32 of the assembly of hollow cylinder shape. At least two cylindrical outer diameter reference parts A, B are formed at the outer periphery of the assembly, and the cutting edges, the outer diameter reference parts and the grip part are coaxially built up. In the method of manufacturing the built-up broach, bracing tools 14, 15 are brought into contact with the outer peripheral reference parts to perform grinding of the cutting edges.