The artificial rainbow-generating device comprises a water supply device for supplying water, a lamination structure including a plurality of lamination members stacked in a vertical direction, a water injection device installed at a desired height of the lamination structure, And a water supply pipe connecting the water supply device and the water injection device so as to be supplied to the water injection device and injected. By stacking the lamination members in the vertical direction and providing a water injection device thereon, water for rainbow formation can be jetted at a desired height by a simple structure.
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