A scroll compressor comprising: a shell having an inner space filled with discharge pressure, the inner space storing a predetermined amount of oil; a driving motor installed in the inner space of the shell; a crankshaft coupled to a rotor of the driving motor, and having an oil passage formed therethrough; a fixed scroll fixed to the inner space of the shell and having a fixed wrap; and an orbiting scroll having an orbiting wrap engaged with the fixed wrap and eccentrically coupled to the crankshaft, and configured to form compression chambers together with the fixed scroll with performing an orbiting motion with respect to the fixed scroll, and a differential pressure hole is formed through the fixed scroll, the differential pressure hole communicating the inner space of the shell with the compression chambers, characterized in that the differential pressure hole comprises a first opening end communicating with the inner space of the shell and a second opening end communicating with the compression chambers, the first opening end and the second opening end communicating with each other, wherein the second opening end communicates with the compression chambers after the suction completion timing, the suction completion timing is a timing when a suction side end of the orbiting wrap contacts a side surface of the fixed wrap, and wherein the first opening end of the differential pressure hole communicates with a thrust bearing surface where the fixed scroll and the orbiting scroll contact each other, and wherein the orbiting scroll is provided with a communication hole, configured to communicate the inner space of the shell with the differential pressure hole, wherein a first opening end defining an inlet of the communication hole is penetratingly formed on a thrust bearing surface between the orbiting scroll and the main frame, and a second opening end of the communication hole defining an outlet thereof is penetratingly formed on the thrust bearing surface where the orbiting scroll and the main frame contact each other, to correspond to the first opening end of the differential pressure hole and communicates with the first opening end of the differential pressure hole at the thrust bearing surface. a shell having an inner space filled with discharge pressure, the inner space storing a predetermined amount of oil; a driving motor installed in the inner space of the shell; a crankshaft coupled to a rotor of the driving motor, and having an oil passage formed therethrough; a fixed scroll fixed to the inner space of the shell and having a fixed wrap; and an orbiting scroll having an orbiting wrap engaged with the fixed wrap and eccentrically coupled to the crankshaft, and configured to form compression chambers together with the fixed scroll with performing an orbiting motion with respect to the fixed scroll, and a differential pressure hole is formed through the fixed scroll, the differential pressure hole communicating the inner space of the shell with the compression chambers, characterized in that the differential pressure hole comprises a first opening end communicating with the inner space of the shell and a second opening end communicating with the compression chambers, the first opening end and the second opening end communicating with each other, wherein the second opening end communicates with the compression chambers after the suction completion timing, the suction completion timing is a timing when a suction side end of the orbiting wrap contacts a side surface of the fixed wrap, and wherein the first opening end of the differential pressure hole communicates with a thrust bearing surface where the fixed scroll and the orbiting scroll contact each other, and wherein the orbiting scroll is provided with a communication hole, configured to communicate the inner space of the shell with the differential pressure hole, wherein a first opening end defining an inlet of the communication hole is penetratingly formed on a thrust bearing surface between the orbiting scroll and the main frame, and a second opening end of the communication hole defining an outlet thereof is penetratingly formed on the thrust bearing surface where the orbiting scroll and the main frame contact each other, to correspond to the first opening end of the differential pressure hole and communicates with the first opening end of the differential pressure hole at the thrust bearing surface.