A compressor comprising: a driving unit including a stator, a rotor, and a rotary shaft provided in the rotor, the rotary shaft having an oil guide path (241, 242, 243) formed at an inner side in a radius direction; a compression unit coupled to the rotary shaft, and having a cylinder and a piston reciprocating in the cylinder by a driving force of the driving unit; and an oil supply unit coupled to a lower end of the rotary shaft, for supplying oil toward the compression unit, wherein the oil supply unit includes a rotary portion (410, 420) for supplying oil toward the oil guide path (241, 242, 243) while being rotated together with the rotary shaft and a fixed portion (430, 440) having an inner space partitioned to accommodate at least a portion of the rotary portion (410, 420), and wherein the oil guide path (241, 242, 243) is formed to pass through the rotary shaft along a length direction, characterized in that a coupling space in which a portion of the rotary portion (410, 420) is pressed is formed at an inner side in a radius direction of the lower end of the rotary shaft, and the oil guide path (241, 242, 243) includes a first path extended from the coupling space upwards, and second path (242 and 243) communicated with the first path and extended from the first path to the upper end of the rotary shaft, wherein the rotary portion (410, 420) includes a shaft coupling portion pressed in the coupling space and a first extension portion extended from an upper end of the shaft coupling portion into the first path, and wherein the first extension portion is eccentric from the center in a radius direction of the rotary portion (410, 420) to correspond to the first path. a driving unit including a stator, a rotor, and a rotary shaft provided in the rotor, the rotary shaft having an oil guide path (241, 242, 243) formed at an inner side in a radius direction; a compression unit coupled to the rotary shaft, and having a cylinder and a piston reciprocating in the cylinder by a driving force of the driving unit; and an oil supply unit coupled to a lower end of the rotary shaft, for supplying oil toward the compression unit, wherein the oil supply unit includes a rotary portion (410, 420) for supplying oil toward the oil guide path (241, 242, 243) while being rotated together with the rotary shaft and a fixed portion (430, 440) having an inner space partitioned to accommodate at least a portion of the rotary portion (410, 420), and wherein the oil guide path (241, 242, 243) is formed to pass through the rotary shaft along a length direction, characterized in that a coupling space in which a portion of the rotary portion (410, 420) is pressed is formed at an inner side in a radius direction of the lower end of the rotary shaft, and the oil guide path (241, 242, 243) includes a first path extended from the coupling space upwards, and second path (242 and 243) communicated with the first path and extended from the first path to the upper end of the rotary shaft, wherein the rotary portion (410, 420) includes a shaft coupling portion pressed in the coupling space and a first extension portion extended from an upper end of the shaft coupling portion into the first path, and wherein the first extension portion is eccentric from the center in a radius direction of the rotary portion (410, 420) to correspond to the first path.