To provide a gas meter with which it is possible to respond to multiple types of mouthpiece pitches while suppressing manufacturing costs.SOLUTION: A gas meter 1 comprises a flow channel 30 which a gas can flow through, a pair of cylindrical members 20 attached to the flow channel 30, and a housing part 10 for accommodating the flow channel 30 and the pair of cylindrical members 20. Each of the pair of cylindrical members 20 includes a first cylindrical part 21 connected to the flow channel 30 and a second cylindrical part 22 to which a mating gas pipe is attached, and also includes a curved shape where the first and second cylindrical parts 21, 22 are arranged in such a way that the respective center axes are offset. The housing part 10 accommodates the flow channel 30 and the pair of cylindrical members 20 while a mating gas pipe is attached to the second cylindrical part 22. The first cylindrical part 21 of the pair of cylindrical members 20 is connected to the flow channel 30 via a connecting point of insert joint structure or connected to the flow channel 30 by welding.SELECTED DRAWING: Figure 2