The invention relates to an obstacle on a bowling lane for keeping the bowling ball on a single bowling lane. The obstacle comprises at least one obstacle element which is arranged to be movable and is located next to the edge of a single bowling lane, in the longitudinal direction of the same, means for moving the obstacle element and means for guiding the movement of the obstacle element. The means for moving the obstacle element comprise a channel (5) underneath the obstacle element that can expanded with a gaseous or liquid substance.