the present invention relates to an electrospinning device for manufacturing a nanofiber , and the purpose of the present invention is to provide an electrospinning device for manufacturing a nanofiber , wherein a substrate is transferred while a nanofiber web is stacked and formed on a side surface of the substrate through electrospinning of a polymer spinning solution , and the substrate is rotated during transfer such that the nanofiber web is stacked and formed on the other side surface ; accordingly , the nanofiber web can be stacked and formed on both surfaces of the substrate through a single manufacturing process ; a drying process is performed simultaneously during rotation of the substrate such that , at the same time the nanofiber web is stacked on both surfaces of the substrate , the substrate is dried through a single manufacturing process , thereby removing any solvent remaining on the nanofiber web ; and , as electrospinning devices , electro - blown electrospinning devices and electro - spinning electrospinning devices are installed alternately , such that electro - spinning electrospinning and electro - blown electrospinning can be performed alternately with regard to a transferred substrate .