To provide a treatment apparatus of VOC gas capable of stably and economically performing deodorizing treatment even in a facility having large time fluctuation of VOC concentration, by equalizing VOC concentration of exhaust gas.

This treatment apparatus of VOC gas collecting exhaust gas containing VOC, leading it to a deodorizing apparatus 1 and decomposing, is provided with a VOC gas analyzer 3 in the upstream side of the deodorizing apparatus 1; a bypass line 6 in the downstream side thereof; a VOC adsorbing/desorbing device 7 selectively adsorbing and desorbing VOC components in the bypass line 6; and a valve 5 controlling air volume to the bypass line 6.

COPYRIGHT: (C)2008,JPO&INPIT