Scroll compressor

A scroll compressor comprising:

• a compression mechanism including a fixed scroll and a movable scroll respectively formed on surfaces of mirror plates with spiral laps facing each other,
• wherein the movable scroll is revolved and turned with respect to the fixed scroll to move a compression chamber formed between the laps of both scrolls from the outside to the inside while reducing the compression chamber to thereby compress a working fluid,
• wherein the laps of the fixed scroll and the movable scroll are configured to have a plurality of step portions between a winding end portion at an outermost periphery and a winding start portion at an innermost periphery and decrease stepwise in height toward the winding start portion from the winding end portion, and
• wherein the position and height of each of the step portions are set so that a base point of each step portion is placed on a predetermined arc drawn on a predetermined plane upon expanding each of the spiral laps on the predetermined plane.