Abstract: The invention relates to a monoski, consisting of a front and a back board connected to each other by means of a hinge, in which the hinge is constructed in such a way that the back board can be folded over the front board through which a less large package is created and also the two board parts can be moved in a horizontal plane in a limited angle. During skiing the skier stands with one foot on the front board and the other on the back board. During skiing, the skiers feet are not fixed to the boards. In order to keep sufficient contact with the ski, a foldable supporting instrument is mounted on the front board part. The back board part has a surface relief at the bottom to track better.