A rollover protection system with at least one rollover protection device allocated to a vehicle seat consists of a first module attached to the body with guide devices for a second module, movable between a lowered rest position and an elevated support position, with a rollover element, a releasable holding device for holding the second module in its rest position, a locking device, by means of which the second module can be automatically supported in a position deviating from its rest position against a force acting in the direction of the rest position, and a drive system with a spring-force accumulator, by means of which the second module, as required, can be moved in the direction of its support position. In a design that permits a pass-through opening, the rollover protection devices of two vehicle seats in a row of seats are arranged in opposite directions, essentially off-center relative to the corresponding vehicle seat.