Gas appliance comprising a shut-off valve (100) and a control unit electrically operating the shut-off valve (100). The shut-off valve (100) comprises a closure orifice (110), a closure member (120) to open and close the gas passage, an electromagnetic actuator (130) comprising a movable assembly (131) attached to the closure member (120), the closure member (120) moving integrally with the movable assembly (131), and electromagnetic means (137) magnetically associated with the movable assembly (131), and a manual actuator (140) for moving the movable assembly (131), said manual actuator (140) comprising an open position in which it is decoupled from the movable assembly (131), the electromagnetic actuator (130) thus being able to act on the closure member (120) to cause its closure.