A practice putting green that is adjustable to provide a playing surface having a variety of contours. The assembly is formed of a plurality of narrow transverse support members that are arranged as segments in side-to-side relationship to define an elongate playing path. Carpet, artificial turf or other flexible material is placed atop the support members to form the playing surface. Inwardly facing wedges are mounted under the ends of the support members and are slid from side-to-side so as to selectively tilt the members and adjust the contour of the playing surface. The wedges on each segment are joined by a transverse rod so that both will move simultaneously in response to pressure on one of the wedges. The support members have a tray-shaped configuration with upwardly extending end walls, so that in combination they define an elongate channel. The layer of pliable material is received in the channel so that the edges thereof engage the walls of the channel on either side so as to hold the support members against shifting out of alignment from side-to-side.