A Pirani vacuum gauge in which a response to a rapid pressure rise is improved and restrictions on a mounting direction of a container on a chamber to be measured for pressure are eliminated is provided. The Pirani vacuum gauge includes a heat filament of metal wire and a support unit for supporting the heat filament in a container, wherein a gas pressure is measured based on an amount of heat conducted away from the heat filament by gas molecules colliding with the heat filament, characterized in that a body of the container is filled with metal material, but a first cylindrical bore and a second cylindrical bore extend through the body, the heat filament being inserted into the first cylindrical bore and the support unit being inserted into the second cylindrical bore.