Abstract: An adjustable golf ball tee has a peg having a pointed end to facilitate pressing of the tee into the ground. The peg has a longitudinal bore which is open at one end and closed at the opposite end. An elongated ball supporting member is slidably disposed in the bore and extends through the open end for adjusting the height of a ball supported on the tee above the ground. A ball seat is provided on the exposed end of the ball supporting member. The ball seat has a concave surface corresponding substantially to the contour of the peripheral surface of a golf ball. The golf ball supporting member is slit longitudinally and, in a preferred embodiment, a first pin is disposed through the slit and anchored at each end to the peg wall. The end of the pin is closed with a second pin disposed across the slit with its ends embedded in the ball supporting member or by the slit terminating short of the end of the supporting member.