Abstract: The present invention provides a board having the functions of draining, blocking, containing, and collecting water, in which only a single draining board is installed at a place requiring smooth drainage so that a water-draining function, a water-blocking function, a water-containing function, and a water-collecting function can be all performed, thereby avoiding the necrosis and withering of landscaping trees. The inventive board includes: a coupling structure for drainage including a lower water-draining board and an upper water-draining board disposed on the lower water-draining board; and a filter disposed to surround the coupling structure for drainage in a tightly sealed state, the filter having a coefficient of permeability of more than 0.001 cm/sec in the vertical direction. The lower-water-draining board includes a pair of opposed vertical portions extending upwardly from both end edges thereof in such a fashion as to be flush with the top surface of the first protrusions.