To provide a scroll compressor high in volmetric efficiency by preventing excess lubricant from being fed to compression chambers.

Since the dimension α in the radial direction of a thrust bearing surface 23b to be disposed to a place outer from the oil feeding groove 23c of a main frame 23, is made roughly two times as large as the turning radius of a turning scroll, lubricant is thereby turned around within the thrust bearing surface so as to be prevented from being fluxed outward as the turning scroll is turned around, and no excess lubricant will never be fed to the compression chambers, so that a volmetric efficiency can thereby be enhanced.