A compressor, comprising: a casing having oil contained at an inner space thereof; a driving motor installed at the inner space of the casing, and configured to generate a rotation force; a compression unit installed at the inner space of the casing, and configured to compress a refrigerant by receiving a rotation force of the driving motor; a crank shaft having an oil passage therein, and configured to transmit the rotation force of the driving motor to the compression unit; and an oil feeder installed so as to be communicated with the oil passage of the crank shaft, and configured to pump up the oil of the casing, wherein the crank shaft is provided, on an outer circumferential surface thereof, with an external groove formed in a spiral shape so as to be communicated with the oil passage, and the number of turns of the external groove is in the range of 1∼1.75, so that an oil supply amount is saturated at a rotation speed corresponding to 70% or more of a constant rotation speed of the driving motor operating at 50 or 60Hz in a constant speed driving mode, wherein the oil feeder comprises: a guide member fixed to the oil passage of the crank shaft, and configured to guide flow of oil; and a pumping member inserted into the guide member and configured to pump up oil, and characterized in that the guide member consists of a first portion having the same inner diameter in an axial direction, and a second portion extending from the first portion and having an inner diameter gradually decreased in an axial direction, wherein the second portion of the guide member has a length longer than that of the first portion. a casing having oil contained at an inner space thereof; a driving motor installed at the inner space of the casing, and configured to generate a rotation force; a compression unit installed at the inner space of the casing, and configured to compress a refrigerant by receiving a rotation force of the driving motor; a crank shaft having an oil passage therein, and configured to transmit the rotation force of the driving motor to the compression unit; and an oil feeder installed so as to be communicated with the oil passage of the crank shaft, and configured to pump up the oil of the casing, wherein the crank shaft is provided, on an outer circumferential surface thereof, with an external groove formed in a spiral shape so as to be communicated with the oil passage, and the number of turns of the external groove is in the range of 1∼1.75, so that an oil supply amount is saturated at a rotation speed corresponding to 70% or more of a constant rotation speed of the driving motor operating at 50 or 60Hz in a constant speed driving mode, wherein the oil feeder comprises: a guide member fixed to the oil passage of the crank shaft, and configured to guide flow of oil; and a pumping member inserted into the guide member and configured to pump up oil, and a guide member fixed to the oil passage of the crank shaft, and configured to guide flow of oil; and a pumping member inserted into the guide member and configured to pump up oil, and characterized in that the guide member consists of a first portion having the same inner diameter in an axial direction, and a second portion extending from the first portion and having an inner diameter gradually decreased in an axial direction, wherein the second portion of the guide member has a length longer than that of the first portion.