To provide a golf putt practice machine enabling practice of putting by changing strength of putting corresponding to a putting distance.

The practice machine comprises a first case and a second case. The first case is a specified length and both sides in the lateral direction are open, wherein a velocity sensor is installed on both end parts and a ball feeding port is formed on one side. The second case is arranged so that both sides in the lateral direction are open, and laterally installed so as to connect with one side of the first case, wherein a transparent window is installed in an upper part for guiding a putter swung in backstroke, and a display means is provided on the other side in the longitudinal direction for displaying input values inputted by a golfer, sensing of the putter swung in backstroke, and putting result by the putter.