<p>Scroll fluid machinery, wherein a fixed scroll (21) with a scroll-shaped lap (24) and a movable scroll (22) are installed on an end plate (23). High polymer actuators (40) adjusting a clearance between the lap (24) and the end plate (23) are fitted into recessed parts at the tip of the lap (24). The high polymer actuators (40) change its shape in the height direction of the lap (24) to adjust the clearance. The high polymer actuators (40) are commonly used as seal members between the end plate (23) and the lap (24). On the other hand, the recessed parts are formed so that a thickness between the recessed parts and the inner peripheral surface of the lap (24) is different from a thickness between the recessed parts and the outer peripheral surface of the lap (24).</p>
