Household appliance

A household appliance (1) with a rack system (10) and an interior space (3) for accommodating the rack system (10), wherein a wall element (5, 5′) is provided on opposite sides of the interior space (3) and a locking projection (7, 7′) is arranged on at least one of the wall elements (5, 5′), wherein the rack system (10) comprises a stationary part (11) arranged in the interior space (3) and a part (12) movable at least partially in front of the interior space via guides, and a locking element (20, 30) is provided on the stationary part (11) for detachable engagement with the locking projection (7, 7′), which is configured to be moved into an unlocked position via a driver (13) on the movable part (12), wherein the locking element (20, 30) is configured to be moved from the unlocked position into the locked position exclusively by gravity, wherein lifting of the locking element (20, 40) from a lowered locked position into a raised unlocked position relates to a center of gravity of the locking element (20, 30), which is lower in the lowered locked position than in the raised unlocked position, and the locking element (20, 30) is configured to be moved via the driver from the lowered locking position into a raised unlocked position or from a raised locking position into the lowered unlocked position.