The present invention is to provide a scroll compressor capable of three-dimensional compression in which high performance can be achieved by optimizing a tip clearance during an operation while taking account of thermal expansion and pressure deformation, and reducing compression leakage thereby enhancing compression efficiency. The three-dimensional compression enabled scroll compressor in which a level difference (13e) is provided between the distal end faces (13c, 13d) and the bottom face of a spiral lap (13b), a lap height is set larger on the outer circumferential side of the spiral lap(13b) than on the inner circumferential side, and compression in the circumferential direction and the lap height direction of the spiral lap (13b) is possible, wherein the height of the spiral lap (13b) on the inner circumferential side of the level difference (13e); is reduced stepwise or continuously and gradually toward the central side of the spiral lap (13b), and the tip clearance (delta) of the spiral lap is increased gradually toward the central side of the spiral lap (13b) on the inner circumferential side of the level difference (13e).