Piping branching device and compressor

A pipe branching device is provided with a main pipe and a branching pipe branching from the main pipe, the main pipe including a first pipe and a second pipe fitted to the first pipe in the axial direction of the first pipe, and a chamber communicating with the branching pipe is provided between the first pipe and the second pipe. And a flow path that communicates from the inside of the second pipe to the chamber is provided. 本发明提供一种配管分支装置，其具备主管和从所述主管分支的分支管，其中，所述主管包括第1配管和在所述第1配管的轴向上嵌合于所述第1配管中的第2配管，在所述第1配管与所述第2配管之间设置有与所述分支管连通的腔室，并且设置有从所述第2配管的内部连通至所述腔室的流路。