Abstract: A modular greened sound-absorbing structure is formed by one or more containment sections (2, 4, 6, 8, 10, 12) for filling material in which plant material can be cultivated. Each containment section comprises frame means (20), connecting means (30, 32) engaged with the frame means in order to connect those frame means to one another, and a plurality of wall means (40) engaged with the frame means in such a manner as to define at least one pair of lateral walls of one of the above-mentioned containment sections. Finally, the containment sections are filled completely with the filling material.