Abstract: A length of cord 13 has means for attaching one end to a golf tee, and the other end is wound onto a rotatable spool 11 within a housing 1 which has an aperture for the cord 13 to extend through. There is also a tensioning means 17 for applying a biassing force to the spool 11 to rotate it in order to retract the cord 13 into the housing 1. The tensioning means may comprise a spiral spring 17 of which the radially inner end can be secured centrally 19 of the housing and the outer end to the spool periphery, and the spring may have a circular cover over it. Retraction of the cord might be controlled using a rachet or a pin engaging with the spool. The housing 1 may be formed from two (3, 5) or more portions, and may be cylindrical. There may be means (7) on the housing 1 to attach the apparatus to a golfer's shoe or the like, such as a clip, cord or hook-and-loop material. The cord 13 may pass through a grommet 9 in the aperture, and it may be coloured to contrast with a golf playing surface.