Abstract: A golf putting practice device to be used as being attached to a part of a body of a golfer is provided. The golf putting practice device includes: a laser indicator that irradiates a laser beam; an arm band that detachably attaches the laser indicator to an arm of the golfer, a free platform that connects the laser indicator to the arm band and adjusts an angle of the laser indicator; and a sliding attachment/detachment device used for attachment and detachment of the laser indicator and used together with an attachment member being provided at an end of the free platform and being configured so as to be pushed into and pulled out of the sliding attachment/detachment device.