A scroll compressor comprising: a casing having an oil storage room at a lower portion thereof; a driving motor provided inside the casing; a rotary shaft coupled to the driving motor, having a first oil supply path through which the oil stored in the oil storage room of the casing is guided upward; a main frame provided under the driving motor; a fixed scroll, provided under the main frame, having a fixed scroll end plate, a fixed scroll sidewall formed to protrude upward from an outer circumferential portion of the fixed scroll end plate, and a fixed wrap protruding from an upper surface of the fixed scroll end plate, wherein an oil groove is formed on a thrust surface of the fixed scroll sidewall; and an orbiting scroll, provided between the main frame and the fixed scroll, having an orbiting scroll end plate having a rotary shaft coupler coupled with the rotary shaft passing therethrough, and an orbiting wrap engaged with the fixed wrap to form a compression room, characterized in that an upper surface of the fixed scroll sidewall includes the thrust surface, wherein the oil groove includes: a first oil groove formed on the thrust surface along an outer circumferential surface of the fixed scroll sidewall; and a second oil groove (290") formed on the thrust surface between the first oil groove and the fixed wrap, and wherein the oil guided upward through the first oil supply path sequentially passes through a high pressure area and a medium pressure area formed between the main frame and the orbiting scroll and reaches the oil groove, wherein a back pressure seal is provided between the main frame and the orbiting scroll to divide the high pressure area and the medium pressure area, wherein the orbiting scroll end plate is provided with a second oil supply path configured to guide the oil, which is guided to the high pressure area through the first oil supply path, to the medium pressure area, wherein the oil guided to the medium pressure area is guided to the oil groove to be supplied to the thrust surface, wherein the medium pressure area is formed on a lower surface of the main frame to form a space with the fixed scroll and the orbiting scroll so that the orbiting scroll is supported by a pressure of the space, wherein the high pressure area is surrounded by the rotary shaft, the main frame, and the orbiting scroll, and wherein a third oil supply path configured to guide the oil guided to the medium pressure area to the oil groove is provided in the orbiting scroll end plate. a casing having an oil storage room at a lower portion thereof; a driving motor provided inside the casing; a rotary shaft coupled to the driving motor, having a first oil supply path through which the oil stored in the oil storage room of the casing is guided upward; a main frame provided under the driving motor; a fixed scroll, provided under the main frame, having a fixed scroll end plate, a fixed scroll sidewall formed to protrude upward from an outer circumferential portion of the fixed scroll end plate, and a fixed wrap protruding from an upper surface of the fixed scroll end plate, wherein an oil groove is formed on a thrust surface of the fixed scroll sidewall; and an orbiting scroll, provided between the main frame and the fixed scroll, having an orbiting scroll end plate having a rotary shaft coupler coupled with the rotary shaft passing therethrough, and an orbiting wrap engaged with the fixed wrap to form a compression room, characterized in that an upper surface of the fixed scroll sidewall includes the thrust surface, wherein the oil groove includes: a first oil groove formed on the thrust surface along an outer circumferential surface of the fixed scroll sidewall; and a second oil groove (290") formed on the thrust surface between the first oil groove and the fixed wrap, and wherein the oil guided upward through the first oil supply path sequentially passes through a high pressure area and a medium pressure area formed between the main frame and the orbiting scroll and reaches the oil groove, wherein a back pressure seal is provided between the main frame and the orbiting scroll to divide the high pressure area and the medium pressure area, wherein the orbiting scroll end plate is provided with a second oil supply path configured to guide the oil, which is guided to the high pressure area through the first oil supply path, to the medium pressure area, wherein the oil guided to the medium pressure area is guided to the oil groove to be supplied to the thrust surface, wherein the medium pressure area is formed on a lower surface of the main frame to form a space with the fixed scroll and the orbiting scroll so that the orbiting scroll is supported by a pressure of the space, wherein the high pressure area is surrounded by the rotary shaft, the main frame, and the orbiting scroll, and wherein a third oil supply path configured to guide the oil guided to the medium pressure area to the oil groove is provided in the orbiting scroll end plate.