A rapid-discharge-valve structural body (2, 2') comprising: a vessel including a supply passage through which a gas is supplied from the outside, a discharge passage configured to discharge the gas to an object to be pressurized, and an exhaust port configured to exhaust the gas in the vessel to the outside; a rapid discharge valve installed in the vessel, the rapid discharge valve including an exhaust port valve body configured to partition an internal space of the vessel into an input-side space including the supply passage and an output-side space including the discharge passage and the exhaust port, and close the exhaust port when a gas is supplied through the supply passage into the input-side space; and a communication passage configured to allow the input-side space and the output-side space to communicate with each other; and a flow rate controller (122, 107) configured to, when a gas is supplied through the supply passage into the input-side space, allow the gas to flow from the input-side space to the output-side space in accordance with a flow rate of the gas to be supplied to the supply passage, and, when no gas is supplied through the supply passage into the input-side space, prevent a flow of a gas from the input-side space to the output-side space, characterized in that the flow rate controller (122, 107) is configured to increase a flow rate of gas that passes through a gap in the flow rate controller as an area of the gap becomes larger when a pressure applied to the flow rate controller from the input-side space increases, and as a result, increase a flow rate of gas that is discharged from the discharge Passage, and the communication passage is configured to pass through the gas both when the gap in the flow rate controller is closed and opened. a vessel including a supply passage through which a gas is supplied from the outside, a discharge passage configured to discharge the gas to an object to be pressurized, and an exhaust port configured to exhaust the gas in the vessel to the outside; a rapid discharge valve installed in the vessel, the rapid discharge valve including an exhaust port valve body configured to partition an internal space of the vessel into an input-side space including the supply passage and an output-side space including the discharge passage and the exhaust port, and close the exhaust port when a gas is supplied through the supply passage into the input-side space; and a communication passage configured to allow the input-side space and the output-side space to communicate with each other; and a flow rate controller (122, 107) configured to, when a gas is supplied through the supply passage into the input-side space, allow the gas to flow from the input-side space to the output-side space in accordance with a flow rate of the gas to be supplied to the supply passage, and, when no gas is supplied through the supply passage into the input-side space, prevent a flow of a gas from the input-side space to the output-side space, characterized in that the flow rate controller (122, 107) is configured to increase a flow rate of gas that passes through a gap in the flow rate controller as an area of the gap becomes larger when a pressure applied to the flow rate controller from the input-side space increases, and as a result, increase a flow rate of gas that is discharged from the discharge Passage, and the communication passage is configured to pass through the gas both when the gap in the flow rate controller is closed and opened.