A light source module includes a light guide plate, a light source, a first color conversion film, at least one optical film and an ink coating. The light guide plate has a first light-emitting surface, a second light-emitting surface opposite to the first light-emitting surface, and a light-incident surface connected between the first light-emitting surface and the second light-emitting surface. The light source is disposed beside the light-incident surface. The first color conversion film is disposed beside the first light-emitting surface. The at least one optical film is disposed beside the light guide plate. The ink coating is disposed on a surface edge or an end surface of at least one of the light guide plate, the first color conversion film, and the at least one optical film, and is configured to allow light to pass therethrough. A display device of the invention is further provided.