Propellant tank and vapor jet emitting device including same

A propellant tank (2) for storing a liquid propellant A and supplying vapor produced by evaporation of part of the liquid propellant A to an external location comprises a tank body (21) for storing the liquid propellant A, a mesh member (23) arranged inside the tank body to cover a liquid surface of the liquid propellant A to divide an interior of the tank body into a liquid propellant storing area LA and a gas storing area GA by utilizing surface tension of the liquid propellant, and a heater (24) arranged to a gas storing area GA side of the tank body to keep the gas storing area GA at higher temperature than temperature in the liquid propellant storing area LA. The tank body has a propellant inlet (21F) open into the liquid propellant storing area LA and a gas outlet (21D) open into the gas storing area GA.