To provide a columnar solar lens made of a transparent material and capable of condensing the sunlight reaching the whole surface of the solar lens from all the directions and all the altitudes on a bottom face of the lens.

This solar lens is constituted by engaging a condensing lens having inverted trapezoidal cross section with the columnar vertical condensing lens through a minute cavity, engaging a straightening lens like saw teeth constituted by arranging innumerable straightening units having an isosceles triangle shape with a light emission face through a minute cavity, reflecting the rays entering from the whole surface of the outer periphery of the lens on inclined faces of the vertical condensing lens and the condensing lens and an inclined face of the straightening lens or transmitting the rays through these inclined faces, and condensing the rays on the light emission face.