A rotary compressor comprising: a cylinder (31a, 31b) including a cylinder chamber (51, 52); a piston (40a, 40b) configured to eccentrically rotate within the cylinder chamber (51, 52); a blade integrally formed with one of the cylinder (31a, 31b) and the piston (40a, 40b) and penetrating a groove formed in the other of the cylinder (31a, 31b) and the piston (40a, 40b) to segment the cylinder chamber (51, 52) into a high pressure chamber (51b, 52b) and a low pressure chamber (51a, 52a); and a pair of bushes (45a and 45b) provided at the groove and sandwiching the blade from both sides of the blade to support the blade, wherein each of the bushes (45a, 45b) has a blade-side sliding surface which is flat and slides along the blade and a groove-side sliding surface which is curved and slides along an inner surface of the groove, at least one of the pair of bushes (45a and 45b) includes an oil supply passage formed from the blade-side sliding surface to the groove-side sliding surface, a blade-side oil reservoir formed on the blade-side sliding surface, one end of the oil supply passage opening to the blade-side oil reservoir, and a groove-side oil reservoir on the groove-side sliding surface, the other end of the oil supply passage opening to the groove-side oil reservoir, characterised in that, a projected area of the groove-side oil reservoir when being projected on the surface parallel to the blade-side sliding surface is wider than a projected area of the blade-side oil reservoir when being projected on the surface parallel to the blade-side sliding surface. a cylinder (31a, 31b) including a cylinder chamber (51, 52); a piston (40a, 40b) configured to eccentrically rotate within the cylinder chamber (51, 52); a blade integrally formed with one of the cylinder (31a, 31b) and the piston (40a, 40b) and penetrating a groove formed in the other of the cylinder (31a, 31b) and the piston (40a, 40b) to segment the cylinder chamber (51, 52) into a high pressure chamber (51b, 52b) and a low pressure chamber (51a, 52a); and a pair of bushes (45a and 45b) provided at the groove and sandwiching the blade from both sides of the blade to support the blade, wherein each of the bushes (45a, 45b) has a blade-side sliding surface which is flat and slides along the blade and a groove-side sliding surface which is curved and slides along an inner surface of the groove, at least one of the pair of bushes (45a and 45b) includes an oil supply passage formed from the blade-side sliding surface to the groove-side sliding surface, a blade-side oil reservoir formed on the blade-side sliding surface, one end of the oil supply passage opening to the blade-side oil reservoir, and a groove-side oil reservoir on the groove-side sliding surface, the other end of the oil supply passage opening to the groove-side oil reservoir, characterised in that, an oil supply passage formed from the blade-side sliding surface to the groove-side sliding surface, a blade-side oil reservoir formed on the blade-side sliding surface, one end of the oil supply passage opening to the blade-side oil reservoir, and a groove-side oil reservoir on the groove-side sliding surface, the other end of the oil supply passage opening to the groove-side oil reservoir, characterised in that, a projected area of the groove-side oil reservoir when being projected on the surface parallel to the blade-side sliding surface is wider than a projected area of the blade-side oil reservoir when being projected on the surface parallel to the blade-side sliding surface.