A scooter is described with a chassis (1) which has a guide bearing (2) for a steering column (4) holding the front wheel (3) and a supporting arm (5), which has a seat (11), for a pivotable footboard (7) which is provided with a rear wheel (8). In order to achieve simple readjustment to a training bike, it is proposed that the supporting arm (5) which is connected to the footboard (7) is coupled to the guide bearing (2) so as to be pivotable about an axis (10) running through the centre point of the rear wheel (8).