A method of manufacturing a CIS solar battery includes preparing a layer-shaped member that is configured by a substrate, a first electrode layer, a CIS layer, and a second electrode layer; setting a temperature of the layer-shaped member to a second temperature that is lower than the first temperature; forming a layer of a layer forming substance having a higher linear expansion coefficient than the substrate in a solid state of the layer on the second electrode layer; and cooling the layer-shaped member. In the method, a thin-film CIS solar battery is acquired by peeling the CIS layer from the first electrode layer along with contraction of the layer of the layer forming substance caused by the cooling of the layer-shaped member.