PROXIMITY SENSOR

Provided is a proximity sensor that can limit degradation in voltage resistance. A proximity sensor 1 comprises: a housing 10; a coil unit that is accommodated in one end of the housing 10; a clamp 20 that is connected to the other end of the housing 10; a substrate 30 that has a circuit mounted thereon, such circuit being electrically connected to the coil unit; a shield 45 that covers a portion of the substrate 30 which is located on the housing 10 side; and a resin which is provided inside the housing 10 and the clamp 20, and which covers at least a portion of the substrate 30. The shield 45 extends to the inside of the clamp 20, and has an extension section 452 that covers at least a portion of the circuit that is located inside the clamp 20.