Trapping device for frugivorous insects. The device comprises trapping means(1) and a single diffuser (6) of attractant means arranged inside the trappingmeans. The diffuser is made up of a container (7) containing inside a support material(9) . This support material, which is of the porous type, is impregnated with asolution comprising a diaminoalkane, ammonium acetate and trimethylamine.