Abstract: A head 4 includes a socket 10 and a weight body 12. The socket 10 has an upper hole part 18 and a lower hole part 20. The weight body 12 has an engaging part 32. The lower hole part 20 and the engaging part 32 can be relatively rotated. By the relative rotation, the weight body 12 can take an engaging position EP and non-engaging position NP. The engaging part 32 has an outermost part E1. The lower hole part 20 has a first portion 20x and a second portion 20y. The outermost part E1 can pass through the first portion 20x while compressively deforming the first portion 20x. A distance D2 between the second portion 20y and an axis line Z is greater than a distance D1 between the first portion 20x and the axis line Z.

Abstract: A head 4 includes a head main body h1, a socket 10, an attachment member 11, and a weight body 12. The head main body h1 includes a socket housing portion 14. The socket 10 is attached to the socket housing portion 14. The socket housing portion 14 includes a first opening K1 through which the socket 10 can be housed. The attachment member 11 is mechanically joined to the head main body h1. The attachment member 11 is disposed so as to block at least a part of the first opening K1. The attachment member 11 controls the falling off of the socket 10 from the first opening K1. The socket 10 includes a held portion 10b. The held portion 10b is pressed by the attachment member 11. The socket 10 is formed of a polymer.

Abstract: A hollow golf club head comprises a head main body made of a metallic material and having a bottom portion including a first portion and a second portion being connected with the first portion having difference in level, and at least one weight member having a specific gravity larger than that of the head main body and attached to the second portion of the head main body.