To provide a multistoried building equipped with a gravity ventilation passage and a ventilation passage structure of the building capable of preventing air stream from flowing in the reverse direction or reducing unevenness in quantity of ventilation air at each story by partitioning the building into sections in accordance with height, ventilating each section by utilizing gravity or adjusting a ratio of opening area on the upstream side to that on the downstream side in the ventilation passage.

This multistoried building is provided with a vertical hole extended from the lowest story of the building up to a rooftop through many stories and the gravity ventilation passage formed by the vertical hole and a communication port for communicating floors at each story mutually to feed air above the building from each story through the gravity ventilation passage. This building is divided into a plurality of sections constituted by one story or a series of stories, S1, S2, etc., and the vertical hole 4 is separated into ventilation holes 14 communicating with communication ports 6 at all the stories in each section S1, S2, etc., and extended upward up to the rooftop by corresponding to each section.