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 . <EOS>