Scroll fluid machine

A scroll fluid machine comprising:

• a pair of a fixed scroll and an orbiting scroll having a structure in which spiral wraps are erected on end plates, respectively, and the spiral wraps engage with each other, wherein
• one of the fixed scroll and the orbiting scroll is a scroll including a step portion provided only at a predetermined position along a spiral direction on a blade bottom surface of the spiral wrap, and the other one of the fixed scroll and the orbiting scroll is a scroll including a step portion provided only at a predetermined position along a spiral direction on a blade tip surface of the spiral wrap,
• a blade bottom surface of the end plate of the scroll which does not include the step portion on the blade bottom surface is set as a reference surface for setting a chip gap between the scrolls, and
• when a wrap height of the spiral wrap of the scroll including the step portion on the blade bottom surface is represented by L and a wrap height of the spiral wrap of the scroll which does not include the step portion on the blade bottom surface is represented by 1, L>1 is satisfied.