To achieve a method of manufacturing a solar cell that prevents protrusions from being formed on a back electrode and also prevents deterioration in cell characteristics of a solar cell, having a thinned substrate, with a minimum increase of the number of processes, using conventional solar-cell manufacturing apparatuses.

The solar cell manufacturing method includes: a surface-electrode forming layer, having a surface-electrode shape formed by a silver paste on the light-receiving surface of a p-type silicon substrate 12, having an n-type diffusion layer 13 formed on the side of the light-receiving surface; a back-extraction-electrode forming layer 321, having a back-extraction-electrode shape formed by a silver paste on the rear surface facing the light-receiving surface; a back-collector-electrode forming layer 311, having a back-collector-electrode shape is formed by a paste, containing aluminum, on the back-extraction-electrode forming layer; and then the p-type silicon substrate is baked so as to manufacture a solar cell, and the back-collector-electrode forming layer 311 is formed by laminating a plurality of aluminum paste layers 311-1, 311-2, respectively, having a back-collector-electrode shape and formed by plural kinds of pastes having different aluminum concentration levels.

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