A steering device of a personal watercraft is disclosed. The steering device typically includes a lower steering column that is mounted to a body of the watercraft and is configured to be rotatable around a rotational axis extending rearward and upward, and an upper steering column that is configured to support a steering handle and is movably coupled to the lower steering column. The upper steering column is movable close to and away from the lower steering column along a straight line extending to be inclined rearward with respect to the rotational axis of the lower steering column.