PURPOSE: To suck forcedly bad-smelling contaminated gas by a method wherein partition plates are installed in parallel upright on an upper plate and a bottom plate within a tank, the upper plate between every partition plates is provided with an injection means while a suction pump is connected to one end of the tank and an exhaust pipe is connected to the other end.

CONSTITUTION: A suction pipe 8 is turned to bad-smelling contamination source, while a blower in rear is operated, thereby bad-smelling contaminated gas is sucked into the suction pipe 8 to introduce the gas into a tank 1. The contaminated gas is obstructed by partition plates 4, 5 within the tank 1 and passed through the tank in a zigzag direction. At the same time, the gas is contacted with a liquid W jetted from an injection means 6. By this gas-liquid contact, the gas is deodorized and at the same time dust which is contained in the gas is removed.