A lighting device may be provided that includes a plurality of single lighting modules that includes: a case including a bottom plate, a first side wall extending from one side end of the bottom plate and a second side wall extending from the other side end of the bottom plate; a light emitter disposed in the case and including a substrate and a plurality of light emitting devices disposed on the substrate; a reflective plate disposed in the case and disposed on the substrate of the light emitter; a diffuser plate disposed in the case, disposed on the light emitter and coupled between the first side wall and the second side wall; and a connecting member comprising a first connecting member extending from the first side wall of the case and a second connecting member extending from the second side wall of the case, and a bracket connecting adjacent two single lighting modules among the plurality of single lighting modules, wherein the bracket is disposed in a space formed between the two single lighting modules.