Modular pool constructive design whose walls are constituted by metallic panels (17, 18, 19), made up by folding metallic sheets, comprising a bottom including a structure that supports a plurality of metallic panels-tiles (16) —said walls (11, 12, 13, 14) are connected to said bottom's structure, making up a unique and non-deformable structure, all the pool's elements are interlinked by semi-permanent connecting means, such as screws and nuts. The dimensions of the pool's elements allow its easy transport in small vehicles or buildings' elevators.