PURPOSE: To reduce a sliding loss or the like in a bearing part by extending an axial center shaft part in the eccentric shaft point end of a crankshaft to a delivery hole inside in a fixed scroll side, and arranging a bearing for supporting the axial center shaft part in an opposite lap side of a fixed scroll.

CONSTITUTION: A main bearing 40 is arranged in the central part of a frame 11 for fixing a fixed scroll 5. A turn bearing 31 is arranged in the center part of a turning scroll 6. Further, an eccentric shaft part 14a of a crankshaft 14 is inserted to the turn bearing 31, and an axial center shaft part 14f is extended to a side of the fixed scroll 5 in a point end of the eccentric shaft part 14a. Here, the axial center shaft part 14f is extended to the inside of a delivery hole 10 in the central part in a side of the fixed scroll 5. A bearing 32 for supporting the axial center shaft part 14f is arranged in an opposite lap side of the fixed scroll 5. On the other hand, a thrust bearing 33 for supporting the crankshaft 14 is arranged in an end part of the axial center shaft part 14f.