An organic electroluminescent device, adapted to enhance device reliability while allowing simplification of a manufacturing process, and a method for manufacturing the same are disclosed. The organic electroluminescent (EL) device, comprising a substrate, TFTs located in respective unit pixel regions on the substrate, a first insulation layer to insulate the TFTs, first electrodes formed on the first insulation layer while contacting the TFTs, respectively, a partition wall positioned between the unit pixel regions on the first insulation layer, a subsidiary electrode formed on the partition wall, an organic light emitting layer positioned on the first electrodes, an insulation part to insulate each first electrode from an associated subsidiary electrode, and a second electrode positioned on the organic light emitting layer and connected with the subsidiary electrode.