To provide an air supply and exhaust device for a store capable of efficiently discharging smoke and smell generated from cooking appliances by the minimum amount of intake air without requiring burden on both customers and employees in the store.

An indoor side opening (1) of an exhaust duct 2 of an exhaust means is provided on the upper side of a dining room D side wall face within a kitchen K, and an indoor side air blowout port 4 of an intake duct 3 of an intake means is provided on the lower side (10) of a boundary portion between the kitchen K and the dining room D. The blowout opening 4 of the intake duct 3 is arranged toward the exhaust duct 2. Due to this configuration, an air curtain made to flow from the air blowout port 4 toward a range hood 1 is formed, and gas (smoke and oil etc.) generated by a charcoal stove O can be efficiently discharged by the minimum amount of intake air.