PURPOSE: To enable the discharge of gas contg. smells after subjecting this gas to a deodorization treatment by disposing a surface ejection type gas push unit in one of smell generating sources and a surface absorption type gas pull unit in the other.

CONSTITUTION: The smells are so joined with the clean gas of a low-speed laminar flow type so as to be included therein when this fresh air is blasted from the surface ejection type gas push unit 1 toward the smell generating source. The gas guided by the air flow of the laminar flow type arrives at the suction port of the surface absorption type gas pull unit 2 and is sucked at an equal velocity by the surface absorption type gas pull unit 2. The smells are thus absorbed without widely diffusing to the ambient, and further, the gas is discharged after the gas is subjected to the deodorization treatment by a deodorization discharge unit 3 connected to the surface absorption type gas pull unit 2. The odorous components are oxidized and cracked by ozone in the ozone reaction unit 6 in the deodorization discharge unit 3 and are subjected to the deodorization treatment. The treated gas is discharged through an adsorption filter cassette 8 to the outside by a discharge fun 5.