To secure stable operation within a wide operating range by setting the height of a turning scroll lap less than the design height of a fixed scroll lap, and determining the design height in combination of manufacturing tolerances of the fixed scroll lap and the turning scroll lap.

The height of a lap 27 of a turning scroll 22 is less than that of a lap 28 of a fixed scroll 26. That is, the fixed scroll 26 is provided with the lap 28 having the height (h), and the turning scroll 22 is provided with the lap 27 having the height (h-d). A distance (d) is preferably less than 24μm, more preferably, less than 10μm. More preferably, the distance (d) is set to a value equal to the sum of manufacturing tolerance of the height of the fixed scroll lap 28 and manufacturing tolerance of the height of the turning scroll lap 27. The outermost limit of an acting radius rnew is defined by the outer periphery 51 outside in the radial direction of the turning scroll 22.