To provide a putter which is usable as an auxiliary implement for putter training for the purpose of cultivating the power of concentration and improving a putting technique and as an ordinarily usable putter.

The putter 1 has a head body 2 which has an aperture on the clubface 2a side for hitting a golf ball and is formed with a through-hole 21 at the clubface 2a, a ball hitting member 30 which is mounted at the head body 2, has a ball hitting surface 31 of the shape equal to the shape of the clubface 2a of the head body 2 at one end face and is formed of a metallic member to an approximately projecting shape and a clubface constituting member 3 which has projection quantity regulating members 34, 35 formed in a washer shape to adjust the ball hitting surface 31 of the ball hitting member 30 to a state of projecting the surface from the clubface 2a or the state of making the surface flush with the clubface 2a. The ball hitting surface 31 of the ball hitting member 30 comprises a fixing and holding plate 4 and screws 5 which are projection state setting means respectively for fixing and holding the state of projecting the ball hitting surface from the clubface 2a or the state of making the surface flush with the clubface 2a.