To enhance the pressure meausing accuracy of a hot-cathode magnetron-type vacuum gage, to reduce photoelectron current, and to reduce a current generated at a time when gas molecules stucked to the inner wall of an anode are driven out by electrons.

In the vacuum gage, a filament 4 which emits thermoelectrons, an anode 5, by which the thermoelectrons emitted from the filament 4 are induced along the magnetic line of force of a magnet 3, sheetlike shields 6 which repel the thermoelectrons at a nagetive potential form the filament 4 and an ion collector 7 on which ions generated by colliding the theremoelectrons with a gas inside a vacuum-gage container 1 are incident are arranged inside the vacuum gage container 1 in which the magnet 3 is installed at the outer circumference. Then, the anode 5 is formed to be a shell shape, it is installed so as to face the shields 6, openings 5a for thermoelectron continuity are formed in positions in which the anode 5 is faced with the shields 6, and the ion collector 7 is arranged in a position which is not irradiated with X-rays generated from the outer face of the anode 5 due to the thermoelectron collision.