Abstract: An improved centrifugal type gas-liquid separator is composed of a rotatable hollow disc-shaped gas-liquid separation chamber having a separated liquid outlet on its outer circumferential surface, a housing surrounding the gas-liquid separation chamber liquid-tightly outside thereof so as not to restrain its rotation and liquid-tightly defining a reservoir chamber of separated liquid between the inner circumference of its outer portion and the outer circumference of the gas-liquid separation chamber. A separated liquid extraction port enables the separated liquid to be extracted continuously from the reservoir chamber of the housing. Tubular rotary shafts are inserted in the proximity of the rotary center axis of the gas-liquid separation chamber along the rotary center axis from the opposite sides of the housing. Gas-liquid mixture fluid is fed into the gas-liquid separation chamber through one of the tubular rotary shafts, and the separated gas is ejected through the other tubular rotary shaft.