An air purifier using underwater bubbles according to one embodiment of the present invention comprises: an air path unit having an inflow opening, at an upper part thereof, for the inflow of air, a path part provided between the inflow opening and a discharge opening and forming a supply path, of which the upper part is wide and the lower part is narrow, and discharge slits, provided on the outer side wall, for the discharge of purified air an optical filter unit for sterilizing and purifying the air, flowing from the inflow opening to the discharge opening, by light and a photocatalyst an air suction unit for suctioning the air through the inflow opening and discharging the same through the discharge opening a bubble generating unit positioned in the discharge opening of the air path unit and having a nozzle for generating bubbles in water and a bubble port unit for storing a liquid for generating bubbles by the bubble generating unit. Therefore, the air purifier can increase a sterilization effect on bacteria in air in comparison to a conventional air purifier, has a low possibility of bacterial propagation on a filter itself, has a simple operating method, can be easily carried so as to be easily installed in a desired use place, does not require the replacement of a pore filter, and can use the filter nearly semi-permanently.Linvention concerne, selon un mode de réalisation, un purificateur dair utilisant des bulles immergées comprenant : une unité de trajet dair ayant une ouverture dentrée, au niveau dune partie supérieure de celle-ci, pour lentrée dair, une partie de trajet prévue entre louverture dentrée et une ouverture dévacuation et la formation dun trajet dalimentation, dont la partie supérieure est large et la partie inférieure est étroite, et des fentes dévacuation, prévues sur la paroi latérale externe, pour lévacuation dair purifié une unité de filtre optique destinée à stériliser et purifier lair sécoulant de louverture dentrée vers louverture déva
