Fluid control device

A fluid control device comprising:

• a first main plate having a first principal surface and a second principal surface;
• a second main plate having a third principal surface, a fourth principal surface, and a first aperture that connects the third principal surface and the fourth principal surface, the second main plate being disposed such that the third principal surface faces the first principal surface of the first main plate;
• a side wall member that is substantially annular and connected to an outer edge of the third principal surface of the second main plate;
• a driving body provided on the first main plate and configured to vibrate the first main plate;
• a first frame disposed outside an outer peripheral end of the first main plate;
• first connecting portions that connect the first main plate and the first frame;
• second apertures, each of which is formed between adjacent ones of the first connecting portions and connects the first principal surface and the second principal surface;
• a second frame disposed outside an outer peripheral end of the first frame;
• a pump chamber between the second main plate, the second frame, and the side wall member, the pump chamber communicating with the first aperture and the second apertures;
• a second connecting portion connecting the first frame and the second frame;
• a third aperture extending from the second connecting portion to the second frame in a radial direction of the fluid control device;
• and
• a fourth aperture, wherein a central portion of the fourth aperture extends from the first frame to the second frame in the radial direction.