A weight interchangeable golf putter is provided having a T shaped head. The head has a main body constituting the main weight and a striking face. From the trailing edge of the top surface a center tail extends rearward to form the T shape of putter plane. At the sides of the tail there are formed end fins with their free ends opened rearward to better guide the putter head through the air during the stroking address. The top of the back weight extends to near midway of the length of the tail and merges with the bottom of the tail. The back weight has a bottom surface in flush with the corresponding bottom of the main body and terminates with an end wall tapered gradually toward the main body to avoid hitting the ground when strokes are made. Three cylindrical bores are formed facing the same backward direction in the common 90-degree angle from the rear wall to receive different metal screws. When the screws are in their initial positions the putter with its face balanced neutralizes the leftward pulling or rightward pushing in the putting of the right-handed golfer who tends to show more pulling problems. Balance adjusting at the day's practice rounds or putting will be rightfully done with ease and no special tool thanks to the protruding screw design which provides an extra visual aid as well as a structural indicator of the invisible sweet spot to improve the actual approach of the ball into the hole cup.