line 370 is formed to have a grid shape in the pixel region 300 so that the cathode bus line 370 and the cathode electrode 390 are electrically and directly coupled in the pixel region 310 per each pixel according to an embodiment of the present invention the cathode bus line 370 is a grid shape only in the pixel region 300 so that the charge transporting layers 381 383 385 are formed only on each of the anode electrodes 341 343 345 per each pixel this may be formed using a fine metal mask for example and the cathode electrode 390 is formed on the entire surface of the substrate the charge transporting layers 381 383 385 are partially formed only on the organic emission layers 361 363 365 so that the cathode bus line 370 and the cathode electrode 390 are electrically coupled to each other per each pixel in the pixel region 300 in addition to the structure of the cathode bus line described in other embodiments of the present invention other structures may be applied such that the cathode bus line is connected to the cathode electrode in the pixel region as mentioned above the organic light emitting device in accordance with an exemplary embodiment of the present invention allow the cathode bus line to be formed only in the.