The object of the invention is to provide a capacitance-detection type pressure switch and pressure sensor. The capacitance-detection pressure switch and pressure sensor that, in the connection between a diaphragm used as one electrode and a signal line for detecting a signal from the diaphragm, can ensure stable conduction without exerting an influence on operating characteristics of the diaphragm. A capacitance-detection type pressure switch 900 of the present invention includes a metallic diaphragm 800 that is displaced in response to a change in pressure of an operating medium supplied from a conduit 11, a movable electrode 921 connected electrically to the diaphragm 800, a fixed electrode 123 provided at an atmospheric pressure side of the diaphragm 800 opposing the conduit 11, and an insulating film ensuring insulation between the fixed electrode and the diaphragm 800, wherein an electrode contact portion 801 for connection to the movable electrode 921 is formed as at least one projection extending toward an exterior on a part of the outer periphery of the diaphragm 800.