Abstract: A golf putting training device for quickly attaching to a golf putter and used on a practice putting green without interfering with other golfers practicing on the same putting green. The training device helps teach the fundamentals of putting a golf ball with proper line of sight over the center of a putter head and the center of a golf ball. The golf putting training device includes a putter shaft attachment housing adapted for adjustably mounting along a length of a golf putter shaft. The shaft includes a lower end attached to the putter head. One end of a first and second brace are releasably attached to the attachment housing. An opposite end of the first and second brace is hinged to one side of a ball alignment arm. The ball alignment arm includes a sight gap along a length of the arm. The sight gap is used to position the alignment arm directly over a center of the golf ball and next to the putter head.