Abstract: An electrospinning device is described for producing nanofibrous porous structures. The device comprises three or more neighbouring outlets (11) separated from one another by a distance of at least 4 cm and positioned in a first plane (12). The device also comprises a second surface (13) for receiving output from the outlets. A relative movement between the three or more neighbouring outlets (11) and the second surface (13) can be applied in a first direction and second direction, the second direction being substantially perpendicular to the first direction. The second surface (13) thereby is facing the first plane wherein the outlets are positioned. The device furthermore comprises a voltage source (9) adapted to apply a potential difference between the first surface and the second surface. It furthermore may comprise a recipient for containing a solution or melt to be electrospun from the outlets and comprises a providing means for providing (10) the solution or melt to the outlets.