Waterproof pressure sensor, and manufacturing method and sensor conveyance body for manufacturing waterproof pressure

A method of manufacturing a waterproof pressure sensor, comprising:

• providing a cavity package having a recess and an edge portion surrounding the recess;
• mounting a pressure detection element in the recess of the cavity package;
• attaching a frame to the edge portion of the cavity package, the frame having an opening above the recess, and a surface more smoothed than a surface of the edge portion;
• injecting a liquid agent into the recess through the opening of the frame so as to fill the recess and come into the opening;
• gelling the liquid agent into a gel agent;
• and
• attaching a contact prevention member having a pressure introducing hole to the frame such that the pressure introducing hole is disposed above the opening, the pressure introducing hole having a diameter smaller than a diameter of the opening.