Abstract: A putting training device including a base adapted of be placed on a putting surface. Spaced apart fence members adjustably mounted on the top surface of the base define an alleyway of a length sufficient to include both the backswing, forward swing and follow through of a putting stroke. The front end of the alleyway is provided with a slot which extends through the thickness of the base, opens outwardly of the front end of the base, and is of a width which causes the golf ball placed in the slot to engage both the putting surface and the side edges of the slot. Reflective means on the base assists in head positioning. The structure of the device provides immediate indication to the golfer of errors.