In a coupling system for coupling an aircraft seat in a rail of the rest thereof, of the type including a base to which the rest of the seat is connected and associated with a locking slide able to be moved using a control device under the control of a handling lever that can be actuated by an assembly operator, between an assembly/disassembly position and a locking position, the control device includes a device in needle form, which is able to be moved in the base by the lever and whereof one end includes a support surface adapted to cooperate with a complementary ramp surface of the slide to move the latter from its assembly/disassembly position towards its locking position, against the stress from an elastic or spring device.