To provide a sunlight condensing system with favorable condensing efficiency of sunlight, capable of using energy of sunlight for plural purposes while having simple structure.

The sunlight condensing system is characterized by that it is composed of light receiving parts arranged in parallel with each other at predetermined intervals, and plural rows of reflectors arranged between the light receiving parts, comprising protruding rows extending in the arrangement direction of the light receiving parts, and having pairs of faces on both sides of the protruding rows individually reflecting sunlight towards the light receiving parts. A dimension between the light receiving part and a base position of the reflector comprising the protruding rows is set at an aspect ratio about 1/(2√3) with respect to a dimension between facing light receiving parts. The light receiving parts and the reflectors are arranged at the aspect ratio on a trough like frame comprising a substantially U-shape with one face opened such that sunlight can enter. The light receiving parts are respectively disposed along an inner side upper rim of an erected wall facing the frame, and the reflectors are disposed in a bottom face portion of the frame.

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