Abstract: A rooftop double floor-type guidance waterproof structure according to the present invention includes upper panels for preventing water from directly falling onto a rooftop, support members for supporting the upper panels at a uniform height above the rooftop, and drain conduits provided on the tops or sides of the upper panels and configured to guide water, falling onto the upper panels, to a space outside the upper panels, and to drain the water, wherein rooftop tree planting is conducted in a space above the upper panels. As a result, rooftop waterproof performance can be further improved, and rooftop tree planting can be more efficiently realized.