A releasing device for a table part of a seat system for passenger vehicles. In a releasing device for a table part of a seat system for passenger vehicles, in particular for aircraft, comprising seat components such as a seat structure, a seat part, a seat back and an armrest, the position of at least one of these seat components being adjustable, wherein the table part is arranged on the seat structure to be tiltable between an operative position and a stowed position, the table part can be secured in the stowed position by means of a locking device which, for releasing the table part into its operative position, can be actuated by the adjustment movement of at least one armrest.