PURPOSE: To provide a die for extrusion of hollow stock capable of suppressing the generation of recrystallization in the pressure bonded part and producing an extrusion stock with few surface recrysatallization.

CONSTITUTION: An extrusion die A, which consists of a female die 1 and male die 2 and in which a female bearing part 2 and male bearing part 1 is arranged face to face with sandwiching a forming clearance 3, is used. Bearing parts 15, 23 are formed to a stepped structure contracting the clearance from the inlet side to outlet side of the extrusion direction, smoothing the flow of forming material into the forming clearance 3. Further, at the bearing parts 15a, 23a, the clearance at passing part of a pressure bonded part 42 of an extrusion stock is set relatively larger than clearance of other parts, a strain rate at extrusion of the bonded part becomes smaller, the generation of large working strain is suppressed and then suppressing temp. rise. Preferably, a heat dissipation space part 17 is formed on the outlet side of the passing part of bonded part of the bearing parts 15, 23, suppressing temp. rise increasingly.