Abstract: The invention relates to a golf cup insert for reducing the size of the hole of a golf cup so that a player is able to putt towards a smaller cup. The cup insert can be inserted into and fixed positionally in the cup so that the upwardly facing end of the insert will present a hole whose diameter is smaller than the diameter of a conventional golf cup and which is located flush with the surface of the ground surrounding the cup. The insert includes a cup insert member whose largest outer diameter is slightly smaller than the internal diameter of the cup and has at its bottom an axially adjustable support which when the insert is inserted into the cup, supports against the bottom thereof and enables the upwardly facing side of the cup to be adjusted to the level of the surface surrounding the golf cup, depending on the depth of the cup.