To provide a flameproof antenna having an antenna cover which is easily manufactured at low cost, is lightweight, and does not change the center frequency of the antenna easily.

A flameproof antenna includes an antenna body 11 provided at an outer end part (support member 5) of a pressure transmitter and an antenna cover 12 covering the antenna body 11. The antenna cover 12 is formed so as to satisfy strength conditions of flameproof construction by polycarbonate and transmit radio waves.