Abstract: The present invention relates to a combination roller blind wherein a fine adjustment means is provided behind an upper face of a headrail, the adjustment means causing an end of a blind sheet wrapped around a blind roll and an end opposite thereof to be fine-adjustably wrapped and unwrapped. When [the blind] is installed on a ceiling or a window frame to completely conceal the bottom edge of the window so that a bottom edge of a weight is adjoining a bottom sill of the window frame, and a portion of a light-transmissive section of the blind sheet is not overlapped, the opposite edge wrapped around the blind roll of the blind sheet can be fine-adjusted by rolling so that the light-transmissive section alternates with and is not completely overlapped by a light blocking section, allowing for complete shading to be achieved while completely concealing the bottom edge of the window.