Abstract: An apparatus for connecting a lattice tower to the nacelle of a wind turbine. The apparatus has high flexural rigidity and enables direct transition between the nacelle and members of the lattice tower. The apparatus includes two rings joined together with vertical plates extending between them. Upper and lower faces of the apparatus are formed by upper and lower horizontal plates. Central ribs are coupled together and with the vertical plates through a plurality of attachment pieces. The central ribs in part form a large central polygonal hole for accommodating an electrical generator.