The invention relates to an embarking/disembarking device (1) for a vehicle. The embarking/disembarking device has an extension (2) that can be moved back and forth between a retracted position and an extended position, a driven carrier (4), which carries along the extension, a motor and an associated transmission (3) in order to drive the carrier (4), braking means (5) in order to at least brake the extension (2), wherein the embarking/disembarking device is characterized in that the extension (2) is supported so as to be movable relative to the carrier (4), and the braking means (5) are moved at least from the released position thereof to the braking position thereof by the relative motion between the extension (2) and the carrier (4).