The light source module according to the embodiment includes a circuit board, a plurality of light emitting elements disposed on the circuit board, and an optical lens disposed on the plurality of light emitting elements and including a protrusion, wherein the protrusion is from the center of the circuit board. It is formed along the circumference of the concentric circle shape, the projection is concave in the upper direction from the lower surface, and includes a first recess formed along the circumference of the concentric circle shape from the center of the circuit board, the plurality of light emitting elements are spaced apart from each other And is disposed within the first recess, and the protrusion has a vertical normal perpendicular to the top surface of the circuit board in the central region of the first recess, wherein the vertical normal is an optical axis of the light emitting device based on a horizontal direction. More adjacent to the center of the circuit board. In addition, the air purifier according to the embodiment has a cylindrical shape, a housing including a suction portion on an outer circumferential surface, a discharge portion located above the housing, a light source module disposed inside the housing, having a cylindrical shape in the housing, and the suction portion And a filter member disposed between the light source modules and a blowing member disposed inside the housing to flow air passing through the filter unit to the outlet, wherein the light source module includes the above-described light source module, and the filter member Is disposed inside the first filter unit and the first filter unit, and includes a second filter unit facing the light source module, the second filter unit includes a photocatalyst filter, and the light source module is configured to transmit light to the second filter unit. Investigate.실시예에 따른 광원 모듈은 회로기판, 상기 회로기판 상에 배치되는 복수의 발광소자 및 상기 복수의 발광소자 상에 배치되며 돌기부를 포함하는 광학 렌즈를 포함하고, 상기 돌기부는 상기 회로기판의 중심으로부터 동심원
