A harvesting device for agricultural products having an elongated shape, such as grass, straw, leguminous plants, biomass products and the like, of the type translatable by a movement means, comprises a frame (2) having a main extension direction (A), a plurality of harvesting elements (3) for agricultural products, each in turn provided with at least an elongated harvesting prong (4), a plurality of bands (6) attached to the frame (2), arranged in succession along said main extension direction (A) and spaced apart so that each harvesting element (3) is at least partially interposed between two successive bands (6). The transport path is divided into a first section (T1), in which a prong (4) portion radially outside the band has a constant or increasing size, and a second section (T2), in which a prong (3) portion radially outside the band has a decreasing size to the disengagement point (D). The device further comprises a plurality of sorting members (10) each associated to a band (6) and positioned below the band (6), along the second section (T2) of the transport path, in which each sorting member (10) is rotatable about its central axis (F)
