The invention relates to a method for supplying gas to a container (20) with inertia gas (18) by means of a gas supply device (1) and the gas supply device (1). The gas supply device comprises a firsttransport wheel (2) used for transporting the container (20), a stop wheel (10) and a disc (3) arranged between the transport wheel (2) and the stop wheel (10) and rotatably connected to the transport wheel (2) and the stop wheel (10), wherein the disc (3) has a channel (4) for conveying inertia gas (18) to supply gas to the container (20).