To provide an aspirator for smoothly replenishing moisture of a disabled person of a hand.

A float valve 31 exists in a liquid reservoir, and an air vent 24 from an air cleaner 14 projects from an upper part. The common hole tip 26 exists in the lower part of a liquid reservoir, and an air vent 8 exists in parallel to a common hole 21 in-between, and a tip air vent projects. The float valve 31 exists in a float valve 1 position 12 when there is no moisture liquid, and blocks up the common hole tip 26. When aspirated by an aspiration port 3, inspired air reaches an aspiration tube hole via an aspiration tube 6, and reaches a liquid feed tube 16 communicating with a liquid feed hole from a connected common hole 21, and sucks the moisture liquid from a liquid feed port 17 contacting with the bottom in a liquid vessel 1. When stopping aspiration, the sucked moisture liquid pushes away the float valve 31, and enters the liquid reservoir. The float valve 31 floats, and reaches a float valve 2 position 13. When the air vent tip is blocked up by the moisture liquid, an air flow to an air vent 15 is cut off, and a flow of the moisture liquid is stopped. A check valve 33 is arranged for stopping a backflow when the liquid vessel 1 exists in a position lower than the inhalation port 3.