A rotary compressor for reducing an amount of residual refrigerant remaining in a compression space without having been discharged through at least one discharge port , comprising: a casing ; a cylinder disposed in the casing and defining the compression space (V) therein; a main bearing and a sub bearing disposed on opposite sides of the cylinder in axial direction to define the compression space (V) together with the cylinder ; a roller eccentrically located in the compression space (V) and disposed on a rotating shaft so as to be rotatable in the compression space (V); and at least one vane slidably inserted into a vane slot provided in the roller to rotate together with the roller ; an outflow passage to allow the residual refrigerant to flow out from the compression space (V), characterised in that the at least one discharge port is formed in the main bearing or the sub bearing ; and in that the outflow passage comprises: a first outflow guide portion disposed in one of the main bearing and the sub bearing and communicating with the compression space (V); a third outflow guide portion disposed in the other one of the main bearing and the sub bearing and communicating with a space outside the compression space (V); and a second outflow guide portion extending through the roller from a first surface of the roller to a second surface thereof, the second surface being opposite to the first surface in axial direction, the roller being configured to connect the first outflow guide portion and the third outflow guide portion with each other through the second outflow guide portion . a casing ; a cylinder disposed in the casing and defining the compression space (V) therein; a main bearing and a sub bearing disposed on opposite sides of the cylinder in axial direction to define the compression space (V) together with the cylinder ; a roller eccentrically located in the compression space (V) and disposed on a rotating shaft so as to be rotatable in the compression space (V); and at least one vane slidably inserted into a vane slot provided in the roller to rotate together with the roller ; an outflow passage to allow the residual refrigerant to flow out from the compression space (V), characterised in that the at least one discharge port is formed in the main bearing or the sub bearing ; and in that the outflow passage comprises: a first outflow guide portion disposed in one of the main bearing and the sub bearing and communicating with the compression space (V); a third outflow guide portion disposed in the other one of the main bearing and the sub bearing and communicating with a space outside the compression space (V); and a second outflow guide portion extending through the roller from a first surface of the roller to a second surface thereof, the second surface being opposite to the first surface in axial direction, the roller being configured to connect the first outflow guide portion and the third outflow guide portion with each other through the second outflow guide portion . a first outflow guide portion disposed in one of the main bearing and the sub bearing and communicating with the compression space (V); a third outflow guide portion disposed in the other one of the main bearing and the sub bearing and communicating with a space outside the compression space (V); and a second outflow guide portion extending through the roller from a first surface of the roller to a second surface thereof, the second surface being opposite to the first surface in axial direction, the roller being configured to connect the first outflow guide portion and the third outflow guide portion with each other through the second outflow guide portion . <EOS>