A light source module includes a light bar and a stiffened bar. The light bar includes a flexible circuit strip and a plurality of light sources. The light sources are disposed on the flexible circuit strip along an extension direction of the flexible circuit strip. The stiffened bar overlaps the flexible circuit strip and is disposed on a face of the flexible circuit strip having the light sources. The stiffened bar surrounds at least one side of each light source and exposes the light sources. The rigidity of the stiffened bar is larger than the flexible circuit strip.