Abstract: A golf swing training apparatus is disclosed which is portable and positionable both indoors and outdoors. The golf swing training apparatus provides longitudinally adjustable vertical support structure, rotation training structure interconnected between the vertical support structure and a golf club, and a rotatable club attachment collar which secures the shaft of the club to the rotation training structure in a manner which allows the club to be swung through a perfect swing plane. The adjustability of the vertical support structure permits modification of the device to suit the height and body structure of the individual user so that an optimal swing plane may be achieved and practiced consistently. The adjustable length of the rotation training structure trains the user to rotate the arms and hips in a manner to keep the club in the proper swing plane while permitting the user to move naturally and unencumbered.