PURPOSE: To check whether a putter face is correctly formed to a cup cut on a green or not by incorporating a miniature laser beam transmitter body and a battery for excitation of this body within a putter head.

CONSTITUTION: A small hole 22 is bored in a cap-shaped part 2 of the putter head 1 and a laser beam transmitting lens part 31 is fitted and pressed therein from the rear surface. The laser beam transmitter body 3 is provided by interposing rubber packing materials 4 and 5 made of rubber as impact resistant absorbent materials between the laser beam transmitting lens part 31 and the cap- shaped part 2 and between the tail side thereof and the deepest part of the housing space part 11. A switch part is formed as an buried type into a grip and is connected to a wiring cord 7 wired as a wiring part in the hollow part in the shaft 8.