To provide a bleeding device for a compression type refrigerating machine capable of preventing a refrigerant vapor from being accompanied with a non-condensed gas released to the outside of a system as much as possible regardless of a refrigerant vapor pressure.

This compression type refrigerating machine 1-1 is constituted by connecting a compressor 13, a condenser 17 and an evaporator 11 by refrigerant piping 21, and a bleeding tank 31 is connected with the condenser 17 to collect the non-condensed gas accumulated in the condenser 17 in a bleeding tank 31. As a gas separation film 57 is disposed in the bleeding tank 31, the inside of the bleeding tank 31 is separated into a refrigerating machine inner side A and a refrigerating machine outer side B at the gas separation film 57, thus the non-condensed gas is moved from the refrigerating machine inner side A to the refrigerating machine outer side B by the pressure difference between the refrigerating machine inner side A and the refrigerating machine outer side B.