A purification device is provided. The purification device includes an air filter and/or a light source module. The air filter has a multi-folded form. The air filter includes a first filter layer having electrostatic adsorption capability and/or a second filter layer stacked on one surface of the first filter layer. The second filter layer includes at least one first region including an ultraviolet photocatalytic material and at least one second region including a visible photocatalytic material. The light source module includes at least one ultraviolet light source facing a portion of the first region of the second filter layer and at least one visible light source facing a portion of the second region of the second filter layer.