Chimney installation wind power generation apparatus according to the present invention is equipment like a bottleneck tube chain venturi tube (100) and; directed to the venturi tube bottleneck portion expansion pipe of the exhaust port 120, the blade guide plate of a wind turbine on the inner peripheral end of the year 130 ' and the wind turbine (200) mounted vertically installed two wind farm support (201); Inner peripheral air outlet grid has ribs (rib) of the tail-type blade support grill 310. The tail blades 300 assembled to the central and vertical; Bearing block 402 is constant barrel axis of rotation 401 of the length and integrally formed with the top and bottom; A venturi tube axis of rotation chimney stack height and the inlet port 130 access door (404) and three-point seat supports the rotating shaft external cylinder (403) on the periphery within a vertical cylindrical body of the specification, the cylinder being open lower inherent in the inner periphery; The bottom rim rotation axis and a circular flange provided integrally with the outer cylinder stopper b (405) with 180 ° intervals in the peripheral top of the support tube assembly (400) and; A circular flange is formed at the top of the rim, the the bottom of the circular socket is assembled chimney flue installation socket 500, which is characterized in that the discharge in a more accelerated flow rate and a chimney compared to the air flow rate by the venturi flow containing a more accelerated rate than air flow rate applied to the blades of a wind turbine, which will be useful inventions and at the same time increasing the power generation efficiency compared to conventional wind turbine generator so as to reduce the driving force of the air conditioner discharging into the chimney.