A sealed switch comprising: a substrate; a lid body overlapping the substrate to be jointed integrally with each other; a switch case formed of the substrate and the lid body; a seal ring provided between overlapping surfaces of the substrate and the lid body to seal a space between the overlapping surfaces by flexible deformation of the seal ring; a movable board arranged in the switch case and rotatably arranged between the substrate and the lid body; movable contact points arranged on an opposing surface of the movable board to the substrate; fixed contact points provided on opposing portions of the substrate to the movable contact points to be electrically connected to/disconnected from the movable contact points with rotation of the movable board; a connecting piece portion formed integrally with the fixed contact point and extending inside the substrate by insert molding to the substrate to be exposed to an outside as a terminal of a connector portion in a side wall of the substrate; an upper shaft portion and a lower shaft portion provided in a shaft portion of the movable board to rotatably support the shaft portion of the movable board to the substrate and the lid body; shaft holes formed in the substrate and the lid body to rotatably support the upper shaft portion and the lower shaft portion through seal bearings respectively; and communicating openings provided in the substrate and the lid body to communicate the shaft holes with an outside, wherein at least one of the seal bearings includes a cylindrical body portion fitted in one of the shaft holes, and a lip-shaped seal portion provided in a lip shape on an inner peripheral surface of the body portion and making flexible contact with a rotary surface of the upper shaft portion or the lower shaft portion opposing the seal portion to seal an inside of the switch case, characterised in that the seal portion is flexibly separated from the rotary surface by a difference between a pressure in the communicating opening side reduced through the communicating opening and the shaft hole communicated with the communicating opening and a pressure in the switch case to form a discharging opening between the rotary surface and the seal portion for discharging an air in the switch case. a substrate; a lid body overlapping the substrate to be jointed integrally with each other; a switch case formed of the substrate and the lid body; a seal ring provided between overlapping surfaces of the substrate and the lid body to seal a space between the overlapping surfaces by flexible deformation of the seal ring; a movable board arranged in the switch case and rotatably arranged between the substrate and the lid body; movable contact points arranged on an opposing surface of the movable board to the substrate; fixed contact points provided on opposing portions of the substrate to the movable contact points to be electrically connected to/disconnected from the movable contact points with rotation of the movable board; a connecting piece portion formed integrally with the fixed contact point and extending inside the substrate by insert molding to the substrate to be exposed to an outside as a terminal of a connector portion in a side wall of the substrate; an upper shaft portion and a lower shaft portion provided in a shaft portion of the movable board to rotatably support the shaft portion of the movable board to the substrate and the lid body; shaft holes formed in the substrate and the lid body to rotatably support the upper shaft portion and the lower shaft portion through seal bearings respectively; and communicating openings provided in the substrate and the lid body to communicate the shaft holes with an outside, wherein at least one of the seal bearings includes a cylindrical body portion fitted in one of the shaft holes, and a lip-shaped seal portion provided in a lip shape on an inner peripheral surface of the body portion and making flexible contact with a rotary surface of the upper shaft portion or the lower shaft portion opposing the seal portion to seal an inside of the switch case, characterised in that the seal portion is flexibly separated from the rotary surface by a difference between a pressure in the communicating opening side reduced through the communicating opening and the shaft hole communicated with the communicating opening and a pressure in the switch case to form a discharging opening between the rotary surface and the seal portion for discharging an air in the switch case.