A wideband solid-state dye-sensitized solar cell was developed using a solution-processed (CH3NH3)(2)SnI6 perovskite film. This solar cell showed a photoelectric conversion over a wide range from the visible region to the near-infrared region up to 1000 nm. A solid-state solar cell device using (CH3NH3)(2)SnI6 perovskite film showed higher spectral sensitivity characteristics in the near-infrared region than devices prepared using other hole-transport materials.