Adjustable golf putter

An adjustable golf putter comprising a shaft and a head connected to the shaft;

• the head containing an active device connected to the back of the putting part;
• the active device including a base provided at its central section a trough to accommodate a roller;
• both ends of the roller being respectively inserted into a sleeve and an adjustment mechanism;
• the putting part being provided with a channel for the sleeve to rest on;
• the roller being connected to a joint for incorporating to the shaft;
• one insertion channel being each provided on both sides of the base;
• a bolt being fixed in each insertion channel, one or a plurality of weight and two nuts being installed thereon;
• and the center of gravity and the weight of the head being adjusted by the position and quantity of the weights.