A putter for golf is provided, which enables to easily can grasp the putting line to the target object by forming a clear and long laser line on the surface by pushing a switch. A putter for golf comprises: a shaft(10) of rod-shape; a grip(20) inserted in the leading end of the shaft; a head(30) adhered to the end part of the shaft; a receiving part(40) having a receiving space inside the grip; a beam generator which is received in the receiving space of the receiving part and radiates laser beam; a power supply unit supplying the necessary power to the beam generator; a slit groove which is formed to be cut in the putting direction; a slope settling portion which is formed under the beam generator in the receiving part; and a lens member(80) in which the prism projection is shaped repetitively at one of the end of the slope settling portion.
