A process for the production of a solar cell, characterized in that the surface of a silicon wafer is periodically exposed through minute spaced portions of an insulating layer formed on the silicon wafer; crystal growth is performed until monocrystalline silicon regions caused at the spaced portions by way of selective epitaxial growth and lateral crystal growth become collided with each other; the insulating layer is removed through gaps left among the monocrystals; a resin is embedded in the gaps; an electrode layer is formed over the surfaces of the monocrystalline silicon regions; the surface of the electrode layer is fastened to a substrate through a resin; a body comprising the monocrystalline silicon regions is separated from the silicon wafer; and a counter electrode is disposed to the monocrystalline silicon regions.