To effectively prevent the spread of a fire to a non-fired space, even when a flame in the fire moves quickly to be propagated through a ventilating flow passage.

This fire-protective ventilating structure 100 is provided with an outer wall member or a partitioning member 1 of a building, the ventilating flow passage 10 penetrated through the outer wall member or the partitioning member 1, and a fire protection measure member 2 arranged in the ventilating flow passage 10 to block the flame of the fire generated in one space in the outer wall member or the partitioning member 1 as a boundary not to be propagated to the other space through the passage 10. In the structure 100, the fire protection measure member 2 includes an inorganic fiber sheet 21 having ventilation performance to allow ventilation in a normal time, and having a flame blocking property for blocking the flame in the fire.