A method of manufacturing a plurality of outer joint members for a plurality of constant velocity universal joints which vary in joint type and joint size, each of the outer joint members comprising a cup section having track grooves formed at an inner periphery of the cup section and engageable with torque transmitting elements (19, 41), and a shaft section formed at a bottom portion of the cup section, wherein a cup member forming the cup section is welded to a shaft member forming the shaft section, the method comprising, for each of the outer joint members: forming the cup member and the shaft member of medium carbon steel; preparing, as the cup member, a cup member having a cylindrical portion (12a1) and a bottom portion (12a2) integrally formed by forging, and a joining end surface formed on an outer surface of the bottom portion (12a2) in a machining step after the forging; preparing, as the shaft member, a shaft member having a joining end surface to be joined to the bottom portion (12a2) of the cup member, which is formed in a machining step; bringing the joining end surface of the cup member and the joining end surface of the shaft member into abutment against each other; and welding the cup member and the shaft member by radiating a beam from an outer side of the cup member to an abutment portion between the cup member and the shaft member in a radial direction of the cup member, the method being characterized in that the shaft member is one of a plurality of the shaft members prepared with respect to the cup member, the shaft members having a variety of specifications depending on a type of a vehicle in which the shaft members are to be assembled, and an outer diameter of the joining end surface of the cup member of each of the outer joint members and an outer diameter of the joining end surface of each of the shaft members of each of the outer joint members are set to equal dimensions among the outer joint members for the constant velocity universal joints having the same joint size, irrespectively of the joint type and the variety of specifications of the shaft members. forming the cup member and the shaft member of medium carbon steel; preparing, as the cup member, a cup member having a cylindrical portion (12a1) and a bottom portion (12a2) integrally formed by forging, and a joining end surface formed on an outer surface of the bottom portion (12a2) in a machining step after the forging; preparing, as the shaft member, a shaft member having a joining end surface to be joined to the bottom portion (12a2) of the cup member, which is formed in a machining step; bringing the joining end surface of the cup member and the joining end surface of the shaft member into abutment against each other; and welding the cup member and the shaft member by radiating a beam from an outer side of the cup member to an abutment portion between the cup member and the shaft member in a radial direction of the cup member, the method being characterized in that the shaft member is one of a plurality of the shaft members prepared with respect to the cup member, the shaft members having a variety of specifications depending on a type of a vehicle in which the shaft members are to be assembled, and an outer diameter of the joining end surface of the cup member of each of the outer joint members and an outer diameter of the joining end surface of each of the shaft members of each of the outer joint members are set to equal dimensions among the outer joint members for the constant velocity universal joints having the same joint size, irrespectively of the joint type and the variety of specifications of the shaft members.