A compressor (100) has a compressor main body (60) formed so that one stroke cycle is performed in a compression room (43) which is partitioned by a rotor (50), cylinder (40), side blocks (20, 30), and vanes (58) during one revolution of the rotor (50). A cyclone block (70) separates a refrigerant oil (R) from refrigerant gas (G), wherein a second discharge section (46) which discharge the refrigerant gas (G) when the pressure inside the compression room (43) reaches the discharge pressure before the compression room (43) faces a first discharge section (45) is formed, and a communicating path (39) which connects a discharge chamber (45a) in the first discharge section (45) and a discharge chamber (46a) in the second discharge section (46) is formed on the upper stream side from the cyclone block (70).