Abstract: A golf club head having a metallic and hollow head body, of which the volume is capable of being enlarged without decreasing the connection strength of a shaft. A hosel is formed thicker at its lower end than at its upper end, while a lower end of a shaft is provided evenly relative to a lower end of the hosel, or otherwise, protrudes slightly downward relative to the same. Thus, a length of the shaft can be saved without decreasing the connection strength of the same to the head body. In another embodiment of the invention, a collar is preformed at an intermediate portion of the hosel, thereby improving the connection strength of the hosel and shaft to the head body, and at the same time, metallic cladding will be unnecessary in manufacturing a golf club head, thereby improving its productivity.

Abstract: A golf club head for lowering the center of gravity of a head body. A sole portion of the head body is formed with a concave portion, into which is fitted a denser balance weight of which the specific gravity is greater than that of the head body. The concave portion has a front end located at a face side of the sole portion, while a back end thereof is located backward relative to a center portion of the sole portion, said back portion protruding more backward at its toe side than at its heel side. According to the invention, the center of gravity G of a head body can be drastically lowered and the distance between the center of gravity G and a face can be elongated, thus enlarging so-called a sweet area without weakening a strength of the head body. Further, as the concave portion proturudes more backward at its toe side than its heel side, so-called slicing balls can be prevented.