AIR CLEANER

The present invention relates to an air cleaner and, more particularly, to an air cleaner provided with a housing divided into an outer housing and an inner housing, wherein the outer housing and the inner housing are separated from one another, a photocatalytic filter and a collection filter are installed in the inner housing, and air flows even through the space between the inner housing and the outer housing. The present invention provides an air cleaner comprising: an outer housing defining an inlet and an outlet; an inner housing disposed in the outer housing and formed to be separated from the outer housing; a fan installed in the inner housing to forcibly discharge air in the outlet direction; a photocatalytic filter installed in the inner housing and disposed in the direction in which air from the fan is discharged or in the direction opposite to that in which the air is discharged; and an ultraviolet light source disposed upstream of the photocatalytic filter in the direction of airflow created by the fan in order to irradiate the photocatalytic filter with ultraviolet rays.