A roll blind is provided which can guarantee a simple operation. The roll blind includes: a supporting frame disposed in a window frame; first and second winding bars rotatably disposed in the supporting frame; a winding driver rotationally driving one of the first and second winding bars; first and second screens coupled to the first and second winding bars, respectively; a weight bar to which the tower ends of the first and second screens are fixed; and a clutch unit binding and unbinding the first and second winding bars with respect to each other.