that is being operated at a constant speed the vibration of the pipe p may be improved however in a case of the pipe p connected to an inverter compressor that is being operated in a considerably large range only the frequency is moved without the vibration being decreased and thus the effect in decreasing the vibration of the pipe p is not large in the case c when the damper for decreasing a piping vibration 1 formed to be separated into the fixation portion 10 and the weight portion 20 such that the fixation portion 10 makes contact with the pipe p without allowing the weight portion 20 to make contact with the pipe p the vibration peak at the case c is largely decreased compared to the case b thus even in a case of the pipe p connected to the inverter compressor that is being operated in a considerably large frequency range the effect in decreasing the vibration of the pipe p becomes large the damper for decreasing a piping vibration 1 configured to decrease the vibration of the pipe p to improve the effect in decreasing a vibration is formed to have a different weight each according to the type of a compressor or the shape of the pipe p that is connected.