Abstract: A putting exerciser comprises a movable ball case provided therein with a plurality of metal balls having a weight, and a rail structure on which the metal balls are movably mounted. The movable ball case includes a plurality of cases spaced apart from each other at a predetermined interval for partially covering upper surfaces of the metal balls. The rail structure comprises a rail part having a groove for mounting the metal ball therein, and a footrest disposed at one side of the rail part.