A scroll compressor, comprising: a compression mechanism in which a fixed scroll and a movable scroll are engaged with each other, thereby providing a compression chamber configured to compress a fluid; a crankshaft having a main shaft and an eccentric portion eccentrically provided at one end of the main shaft and coupled to a back side of the movable scroll; an upper bearing supporting an upper portion of the main shaft of the crankshaft; a lower bearing supporting a lower portion of the main shaft of the crankshaft; and a drive motor having a stator and a rotor coupled to the main shaft of the crankshaft, and configured to rotate the movable scroll, wherein at least one of the main shaft of the crankshaft or the rotor of the drive motor is provided with a weight which reduces distortion of the crankshaft caused by a fluid load generated in the compression chamber and applied to the eccentric portion during rotation, characterised in that, the weight includes a fluid-induced distortion reducing weight (81, 82, 83) which reduces distortion of the crankshaft in a direction of the fluid load, the fluid-induced distortion reducing weight (81, 82, 83) includes an upper fluid-induced distortion reducing weight which is provided at an upper portion of the main shaft and of which a center of gravity is located away from an axial center of the main shaft in a direction opposite to the direction of the fluid load, a middle fluid-induced distortion reducing weight which is provided at a middle portion of the main shaft and of which a center of gravity is located away from the axial center of the main shaft in a same direction as the direction of the fluid load, and a lower fluid-induced distortion reducing weight which is provided at a lower portion of the main shaft and of which center of gravity is located away from the axial center of the main shaft in the direction opposite to the direction of the fluid load, and the upper fluid-induced distortion reducing weight, the middle fluid-induced distortion reducing weight, and the lower fluid-induced distortion reducing weight are balanced with one another. a compression mechanism in which a fixed scroll and a movable scroll are engaged with each other, thereby providing a compression chamber configured to compress a fluid; a crankshaft having a main shaft and an eccentric portion eccentrically provided at one end of the main shaft and coupled to a back side of the movable scroll; an upper bearing supporting an upper portion of the main shaft of the crankshaft; a lower bearing supporting a lower portion of the main shaft of the crankshaft; and a drive motor having a stator and a rotor coupled to the main shaft of the crankshaft, and configured to rotate the movable scroll, wherein at least one of the main shaft of the crankshaft or the rotor of the drive motor is provided with a weight which reduces distortion of the crankshaft caused by a fluid load generated in the compression chamber and applied to the eccentric portion during rotation, characterised in that, the weight includes a fluid-induced distortion reducing weight (81, 82, 83) which reduces distortion of the crankshaft in a direction of the fluid load, the fluid-induced distortion reducing weight (81, 82, 83) includes an upper fluid-induced distortion reducing weight which is provided at an upper portion of the main shaft and of which a center of gravity is located away from an axial center of the main shaft in a direction opposite to the direction of the fluid load, a middle fluid-induced distortion reducing weight which is provided at a middle portion of the main shaft and of which a center of gravity is located away from the axial center of the main shaft in a same direction as the direction of the fluid load, and a lower fluid-induced distortion reducing weight which is provided at a lower portion of the main shaft and of which center of gravity is located away from the axial center of the main shaft in the direction opposite to the direction of the fluid load, and an upper fluid-induced distortion reducing weight which is provided at an upper portion of the main shaft and of which a center of gravity is located away from an axial center of the main shaft in a direction opposite to the direction of the fluid load, a middle fluid-induced distortion reducing weight which is provided at a middle portion of the main shaft and of which a center of gravity is located away from the axial center of the main shaft in a same direction as the direction of the fluid load, and a lower fluid-induced distortion reducing weight which is provided at a lower portion of the main shaft and of which center of gravity is located away from the axial center of the main shaft in the direction opposite to the direction of the fluid load, and the upper fluid-induced distortion reducing weight, the middle fluid-induced distortion reducing weight, and the lower fluid-induced distortion reducing weight are balanced with one another.