A vacuum cleaner comprising: a body including a space configured to allow air to flow therethrough; a suction inlet configured to introduce the air into the body; a suction motor provided in the body; a dust separation module provided in the body and arranged between the suction inlet and the suction motor, the dust separation module configured to separate foreign substances from the air; an exhaust module configured to discharge the air passing through the suction motor from the body, the exhaust module including at least one exhaust filter comprising a photocatalyst; and a lighting module provided in the body and configured to radiate light toward the exhaust filter, wherein the body comprises a motor housing including a predetermined space configured to form an air flow path, the motor housing configured to accommodate the suction motor, wherein the air passing through the dust separation module rises upward along an outer surface of the motor housing and flows through the motor housing toward the suction motor (11, wherein the body comprises a flow guide coupled to an outer surface of the motor housing, the flow guide configured to form the air flow path between the outer surface of the motor housing and the flow guide, wherein the lighting module comprises: a lighting frame, including: a plurality of protruding coupling portions, a number of the protruding coupling portions corresponding to the number and shape of the protrusions in the flow guide; and an inlet coupling portion arranged between adjacent protruding coupling portions, the inlet coupling portion corresponding to the inlet in the flow guide; and a light irradiator provided on an upper surface of at least one of the protruding coupling portions and configured to radiate light upward. a body including a space configured to allow air to flow therethrough; a suction inlet configured to introduce the air into the body; a suction motor provided in the body; a dust separation module provided in the body and arranged between the suction inlet and the suction motor, the dust separation module configured to separate foreign substances from the air; an exhaust module configured to discharge the air passing through the suction motor from the body, the exhaust module including at least one exhaust filter comprising a photocatalyst; and a lighting module provided in the body and configured to radiate light toward the exhaust filter, wherein the body comprises a motor housing including a predetermined space configured to form an air flow path, the motor housing configured to accommodate the suction motor, wherein the air passing through the dust separation module rises upward along an outer surface of the motor housing and flows through the motor housing toward the suction motor (11, wherein the body comprises a flow guide coupled to an outer surface of the motor housing, the flow guide configured to form the air flow path between the outer surface of the motor housing and the flow guide, wherein the lighting module comprises: a lighting frame, including: a plurality of protruding coupling portions, a number of the protruding coupling portions corresponding to the number and shape of the protrusions in the flow guide; and an inlet coupling portion arranged between adjacent protruding coupling portions, the inlet coupling portion corresponding to the inlet in the flow guide; and a light irradiator provided on an upper surface of at least one of the protruding coupling portions and configured to radiate light upward. a plurality of protruding coupling portions, a number of the protruding coupling portions corresponding to the number and shape of the protrusions in the flow guide; and an inlet coupling portion arranged between adjacent protruding coupling portions, the inlet coupling portion corresponding to the inlet in the flow guide; and a light irradiator provided on an upper surface of at least one of the protruding coupling portions and configured to radiate light upward.