NOVELTY - A thin-film solar cell comprises solar cell layer (I) (310) in which several unit cells including photoelectric conversion layers are connected in series, solar cell layer (II) (320) in which several unit cells including photoelectric conversion layers are connected in series, and electrode connector which connects solar cell layer (I) and (II).    USE - Thin-film solar cell.    ADVANTAGE - The thin-film solar cell is economical, has improved photoelectric conversion efficiency and is manufactured in high yield.    DETAILED DESCRIPTION - A thin-film solar cell comprises solar cell layer (I) in which several unit cells including photoelectric conversion layers are connected in series, solar cell layer (II) in which several unit cells including photoelectric conversion layers are connected in series, and electrode connector which connects solar cell layer (I) and (II). The solar cell layer (I) and (II) is chosen from amorphous silicon solar cell layer and microcrystalline silicon solar cell layer. The photoelectric conversion layers contains material chosen from amorphous silicon, microcrystalline silicon, monocrystalline silicon, polycrystalline silicon, amorphous silicon carbide, amorphous silicon nitride, amorphous silicon-germanium, amorphous silicon stannide, gallium arsenide, aluminum gallium arsenide, indium phosphorus, gallium phosphorus, copper indium gallium selenide, cadmium telluride, cadmium sulfide, copper sulfide, zinc telluride, lead sulfide, copper indium diselenide and/or gallium antimonide. The amorphous silicon solar cell layer is formed such that p-i-n type amorphous silicon layer is stacked or p-n type amorphous silicon layer is stacked. The microcrystalline silicon solar cell layer is formed such that p-i-n type microcrystalline silicon layer is stacked or p-n type microcrystalline silicon layer is stacked. An INDEPENDENT CLAIM is included for the manufacture of thin-film solar cell.    DESCRIPTION OF DRAWING(S) - The drawing shows the sectional view of the structure of the thin-film solar cell module.    Substrate (300)    Transparent conductive layer (310,311)    Solar cell layers (320,330)    Electrode layer (340)