GAS METER

PURPOSE: To shorten a required time for the installation of a gas meter by allowing a pressure fluctuation absorbing valve to operate normally even if the posture thereof tilts when the gas meter is installed in the gas meter equipped with the pressure fluctuation absorbing valve in which a primary side pressure fluctuation is absorbed by the change of a gas path area resulting from the movement of a disc-like valve body in an axis direction in response to a pressure difference between a primary side and a secondary side. CONSTITUTION: A pressure fluctuation absorbing valve is set in a partition plate 1 partitioning a primary side gas inflow chamber C1 and a secondary side gas amount measuring chamber C2 . The moving axis line of the valve body 2 of the pressure fluctuation absorbing valve is set to a horizontal posture, and a spring 5 energizing the valve body 2 in a valve closing direction is interposed between the valve body 2 and the supporting portion thereof.