Abstract: The present invention relates to a structure of putter in golf club, and it is structured such that upper and lower confirming indicator boards for zero point sighting and a level are provided, so that in case of executing a putting exercise, it is made to enable to confirm whether or not the putter is exactly made to be arched against the ground surface via a level, and at the same time, an exerciser (user) exercises by confirming directly with one eye via a measuring device weather or not the eye is exactly positioned at a place being perpendicular against a ball so as to be accustomed with a putting posture to a body, and in case when executing a game on a real green, a putting sense accustomed by the exercise is exerted with self-reliable sense so that a self-reliable sense and exactitude of the putting is provided.