A method of manufacturing an outer joint member (11, 11 1, 11 2) of a constant velocity universal joint, the outer joint member comprising: a cup section (12, 12 1, 12 2) having track grooves formed at an inner periphery of the cup section and configured to allow torque transmitting elements to roll thereon (19, 41); and a shaft section (13, 13 1, 13 2) formed at a bottom portion of the cup section (12, 12 1, 12 2), the outer joint member (11, 11 1, 11 2) being constructed by forming the cup section and the shaft section (13, 13 1, 13 2) through use of separate members, and by welding a cup member (12a, 12a 1, 12a 2) forming the cup section (12, 12 1, 12 2) and a shaft member (13a, 13a 1, 13a 2) forming the shaft section (13, 13 1, 13 2), the cup member (12a, 12a 1, 12a 2) and the shaft member (13a, 13a 1, 13a 2) being made of medium to high carbon steel, the cup member (12a, 12a 1, 12a 2) having a bottomed cylindrical shape that is opened at one end, and comprising a cylindrical portion (12a1, 12a1 1, 12a1 2), a bottom portion (12a2, 12a2 1, 12a2 2), and a short shaft section (12a3, 12a3 1, 12a3 2) of a solid shaft shape protruding from the bottom portion (12a2, 12a2 1, 12a2 2) and having a joining end surface (50, 50 1, 50 2) at an end portion, the shaft member (13a, 13a 1, 13a 2) having a solid shaft shape and having a joining end surface at one end thereof, the joining end surface (50, 50 1, 50 2) of the cup member (12a, 12a 1, 12a 2) and the joining end surface of the shaft member (13a, 13a 1, 13a 2) being brought into abutment against each other, a high energy intensity beam being radiated from an outer side in a radial direction to form a welded portion, the welded portion comprising a welded metal that is molten and solidified during welding and a heat-affected portion in a periphery of the molten metal, the method being characterized in that the welding is performed after heat input through pre-heating, and post-heating is performed after the welding, so that a structure of the welded metal at the welded portion loses martensite and is formed into a mixed phase of ferrite and granular cementite. a cup section (12, 12 1, 12 2) having track grooves formed at an inner periphery of the cup section and configured to allow torque transmitting elements to roll thereon (19, 41); and a shaft section (13, 13 1, 13 2) formed at a bottom portion of the cup section (12, 12 1, 12 2), the outer joint member (11, 11 1, 11 2) being constructed by forming the cup section and the shaft section (13, 13 1, 13 2) through use of separate members, and by welding a cup member (12a, 12a 1, 12a 2) forming the cup section (12, 12 1, 12 2) and a shaft member (13a, 13a 1, 13a 2) forming the shaft section (13, 13 1, 13 2), the cup member (12a, 12a 1, 12a 2) and the shaft member (13a, 13a 1, 13a 2) being made of medium to high carbon steel, the cup member (12a, 12a 1, 12a 2) having a bottomed cylindrical shape that is opened at one end, and comprising a cylindrical portion (12a1, 12a1 1, 12a1 2), a bottom portion (12a2, 12a2 1, 12a2 2), and a short shaft section (12a3, 12a3 1, 12a3 2) of a solid shaft shape protruding from the bottom portion (12a2, 12a2 1, 12a2 2) and having a joining end surface (50, 50 1, 50 2) at an end portion, the shaft member (13a, 13a 1, 13a 2) having a solid shaft shape and having a joining end surface at one end thereof, the joining end surface (50, 50 1, 50 2) of the cup member (12a, 12a 1, 12a 2) and the joining end surface of the shaft member (13a, 13a 1, 13a 2) being brought into abutment against each other, a high energy intensity beam being radiated from an outer side in a radial direction to form a welded portion, the welded portion comprising a welded metal that is molten and solidified during welding and a heat-affected portion in a periphery of the molten metal, the method being characterized in that the welding is performed after heat input through pre-heating, and post-heating is performed after the welding, so that a structure of the welded metal at the welded portion loses martensite and is formed into a mixed phase of ferrite and granular cementite.