An electrospinning apparatus for mass production of nanofibers and for uniform deposition of nanofibers on substrate comprising: a plurality of multinozzle spinnerets, each spinneret having two or more rows of nozzles, the each row having two ends and a middle portion, each row having a plurality of nozzles, wherein interspace between nozzles arranged in a row is at least 10 mm and interspace between rows of nozzles is at least 15 mm; each of the spinnerets being mounted on a frame, which allows each spinneret to be moved in direction perpendicular to the movement of the substrate; at least one reservoir for storing the polymeric solution, at least one of the spinnerets being in fluid communication with the reservoir for delivering the polymer solution to the nozzles, each of the nozzle being provided with needles in the nozzle outlet opening; a pressure regulating device to control flow rate of polymer through the nozzles; a collector for collecting nanofibers on a substrate which is movably disposed on the charged collector; an arrangement for linear movement of substrate m the space between needles outlet ends and the collector; a dual pole power supply for charging the needles and the collector, the needles outlet ends and the collector having opposite polarity; characterized in that the nozzle at each of two ends of the rows being idle, the needles and the nozzles are held together at a fixed distance to each other and at the same charge using a connector element, the plurality of multinozzle spinneretes are mounted on the frame with mechanisms comprising parts made of a non conducting material, to adjust interspace between two adjacent spinnerets, and to adjust angle of the rows of nozzles on the spinneret with respect to direction of movement of the substrate for uniform deposition of nanofibers on the substrate. a plurality of multinozzle spinnerets, each spinneret having two or more rows of nozzles, the each row having two ends and a middle portion, each row having a plurality of nozzles, wherein interspace between nozzles arranged in a row is at least 10 mm and interspace between rows of nozzles is at least 15 mm; each of the spinnerets being mounted on a frame, which allows each spinneret to be moved in direction perpendicular to the movement of the substrate; at least one reservoir for storing the polymeric solution, at least one of the spinnerets being in fluid communication with the reservoir for delivering the polymer solution to the nozzles, each of the nozzle being provided with needles in the nozzle outlet opening; a pressure regulating device to control flow rate of polymer through the nozzles; a collector for collecting nanofibers on a substrate which is movably disposed on the charged collector; an arrangement for linear movement of substrate m the space between needles outlet ends and the collector; a dual pole power supply for charging the needles and the collector, the needles outlet ends and the collector having opposite polarity; characterized in that the nozzle at each of two ends of the rows being idle, the needles and the nozzles are held together at a fixed distance to each other and at the same charge using a connector element, the plurality of multinozzle spinneretes are mounted on the frame with mechanisms comprising parts made of a non conducting material, to adjust interspace between two adjacent spinnerets, and to adjust angle of the rows of nozzles on the spinneret with respect to direction of movement of the substrate for uniform deposition of nanofibers on the substrate.