PROBLEM TO BE SOLVED: To provide a humor suction instrument capable of sucking and accumulating humor in the inside of a container, and preventing any possibility that the humor accumulated in the inside of the container and influenza virus of an affected individual enter the mouth through an air suction tube.SOLUTION: In a state where a tip end of a nasal discharge suction tube 17 is inserted into a nasal cavity, when a person holds the tip end of an air suction tube 16 in the mouth and sucks it, an air in a first chamber 10A is sucked, and a diaphragm 13 is deformed to reduce the volume of the first chamber. Accordingly, the volume of a second chamber 10B is increased, and air inflow to the second chamber is prevented by a check valve 14a, so that negative pressure is generated in the second chamber. The negative pressure acts on the nasal cavity to open a suction check valve 14b and, along with the air, the nasal discharge is sucked into the second chamber via the nasal discharge suction tube inserted into the nasal cavity. The first chamber and the second chamber are isolated by the diaphragm, so that, even when the person forcefully sucks the air suction tube 16, the nasal discharge and the virus are prevented from being sucked from the second chamber via the air suction tube into the mouth, thus preventing secondary infection of the virus.
