An aspiration device (1) provided with an aspiration port (90) exposed to the outside, flow channels (91-98) leading to the aspiration port (90), and a discharge port (99) for discharging fluid from the flow channels (91-98), wherein are provided a diaphragm (83) having one principal surface facing a pump chamber (98) and another principal surface facing the one principal surface, and a piezoelectric element (81) for displacing the one principal surface of the diaphragm with respect to the pump chamber (98), the piezoelectric element (81) being attached to the diaphragm (83), and the one principal surface and other principal surface of the diaphragm (83) are oriented in a different direction from the direction in which the aspiration port (90) is oriented.
