A compressor, comprising: a casing connected to a suction pipe and to a discharge pipe; a compression device having a compression chamber and configured to receive, compress, and discharge a refrigerant; a drive motor disposed in the casing; the casing including a body and a main frame fixed to the body; a fixed scroll fixed to an upper surface of the main frame, and having a suction port (31 b) that communicates with the casing and a discharge port (31 c) that communicates with the casing, an orbiting scroll orbitably disposed on the upper surface of the main frame, the orbiting scroll forming a plurality of compression chambers by being engaged with the fixed scroll; a high-low pressure separating plate disposed on the fixed scroll, the high-low pressure separating plate dividing an inside of the casing into a suction space and a discharge space; and an oil blocking device configured to block oil from the compression device from spreading onto certain mechanical parts disposed thereunder and from being introduced into the compression chamber, characterised in that the oil blocking device comprises a blocking plate with at least one oil flow path adjacent an outer circumference of the blocking plate, the outer circumferential surface of the blocking plate being adhered onto an inner circumferential surface of the casing, wherein the at least one oil flow path comprises at least one passage concavely formed at an outer periphery of the blocking plate, wherein the at least one concavely formed passage is disposed adjacent to the casing to form an enclosed oil passage therewith, wherein a guide member is disposed towards a lower side of the casing so as to be connected to the oil flow path, and wherein the guide member is coupled to the casing by welding so that an opening thereof forms the oil flow path together with an inner circumferential surface of the casing. a casing connected to a suction pipe and to a discharge pipe; a compression device having a compression chamber and configured to receive, compress, and discharge a refrigerant; a drive motor disposed in the casing; the casing including a body and a main frame fixed to the body; a fixed scroll fixed to an upper surface of the main frame, and having a suction port (31 b) that communicates with the casing and a discharge port (31 c) that communicates with the casing, an orbiting scroll orbitably disposed on the upper surface of the main frame, the orbiting scroll forming a plurality of compression chambers by being engaged with the fixed scroll; a high-low pressure separating plate disposed on the fixed scroll, the high-low pressure separating plate dividing an inside of the casing into a suction space and a discharge space; and an oil blocking device configured to block oil from the compression device from spreading onto certain mechanical parts disposed thereunder and from being introduced into the compression chamber, characterised in that the oil blocking device comprises a blocking plate with at least one oil flow path adjacent an outer circumference of the blocking plate, the outer circumferential surface of the blocking plate being adhered onto an inner circumferential surface of the casing, wherein the at least one oil flow path comprises at least one passage concavely formed at an outer periphery of the blocking plate, wherein the at least one concavely formed passage is disposed adjacent to the casing to form an enclosed oil passage therewith, wherein a guide member is disposed towards a lower side of the casing so as to be connected to the oil flow path, and wherein the guide member is coupled to the casing by welding so that an opening thereof forms the oil flow path together with an inner circumferential surface of the casing.