A vapor-liquid separator is disclosed which is capable of improving a
dischargeability of a separated liquid and of suppressing a reversed
flow. The present vapor-liquid separator comprises a cylindrical
separator main body, an introducing part for introducing the vapor-liquid
mixed fluid into the separator main body in the tangential direction, a
liquid discharging part for discharging a separated liquid, a gas
exhausting part for exhausting the separated gas, a storing part for
storing a liquid passed through the liquid discharging part, a
stored-liquid discharging part provided in the storing part to discharge
a stored liquid and a communicating part for communicating the storing
part with an upstream side of a vapor-liquid separation region of the
separator main body and/or the introducing part.