Abstract: This invention relates to an exhaust gas purifying system for diminishing air pollution essentially comprising to purifying devices side by side in sequential combination. The purifying device comprises a casing formed with a water or liquid chemical tank having deposit collecting means and means for draining deposits and a chamber over the tank forming a downward passage fitted with strainer and a spray duct positioned in the chamber and over the strainers and having a number of nozzles directing downwardly and means for supplying clean water or liquid chemical from the tank to the spray duct, whereby exhaust gases led into this device will flow along the passage and through the strainers and purified by tiny dropped water or liquid chemical from the spray duct.