a damper for decreasing a piping vibration capable of enhancing the efficiency in decreasing the piping vibration and adjusting the weight of a weight portion according to the type of the compressor and the shape of the pipe applied to the compressor by separating a fixed portion from a weight portion such that the fixed portion makes a direct contact with a pipe and the weight portion has an interval from the pipe without making a direct contact with the pipe , in which the damper installed on the pipe to decrease the vibration includes a fixation part provided with a coupling hole formed therein to be coupled to the pipe , and coupled and fixed to the pipe such that the coupling hole makes contact with an outer circumferential surface of the pipe , and a weight part connected to the fixation part .