To realize a pressure sensor that can positively seal the interface of a connector and a terminal pin from a fluid such as oil over a long period of time.

This pressure sensor is provided with a fluid storage chamber 23; a sensor 38 arranged in the fluid storage chamber 23 to convert pressure into an electric signal; a terminal pin 42 with one end exposed onto the sensor 38 side of a wall constituting the fluid storage chamber 23; a bonding wire 26 for connecting an exposed part 42b (a projecting part 42a) of the terminal pin 42 to the sensor 38; and a seal S extending between a side face wall 37d constituting the fluid storage chamber 23, and the exposed part 42b (the projecting part 42a) of the terminal pin 42. In the pressure sensor, the seal S and the exposed part 42b (the projecting part 42a) of the terminal pin 42, or the seal S and the side face wall 37d constituting the fluid storage chamber 23, are firmly bonded through a primer P.