Rotary compressor

A rotary compressor, comprising:

• a casing;
• a cylinder provided inside of the casing to form a compression space;
• a main bearing and a sub bearing provided on axial sides of the cylinder, respectively, and provided with a main bearing hole and a sub bearing hole passing therethrough, respectively, in an axial direction;
• a rotary shaft supported by passing through the main bearing hole and the sub bearing hole;
• a roller provided on the rotary shaft to be eccentrically provided in the compression space;
• and
• at least one vane slidably inserted into at least one vane slot provided in the roller or the cylinder to divide the compression space into a plurality of compression chambers, wherein the at least one vane is provided with at least one oil supply groove on at least one of circumferential side surfaces thereof, wherein the at least one oil supply groove extends from an edge of a vane rear end surface to communicate with the vane rear end surface accommodated in the at least one vane slot, wherein support portions are provided on both axial sides of the at least one oil supply groove, respectively, to be in contact with an inner surface of the at least one vane slot and wherein the support portions extend from the vane rear end surface so as to protrude beyond the at least one oil supply groove.