An organic light emitting display device (100, 200, 300, 400, 500), comprising: an organic light emitting display panel including a plurality of sub pixels (SP1, SP2, SP3, SP4) in a display area; a pattern buffer layer (160, 260, 360, 460, 560) disposed on the organic light emitting display panel and patterned so as to overlap at least one sub pixel of the plurality of sub pixels (SP1, SP2, SP3, SP4); a color filter layer disposed on the pattern buffer layer (160, 260, 360, 460, 560) and including a plurality of color filters (171, 172, 173, 174) corresponding to the plurality of sub pixels (SP1, SP2, SP3, SP4); and a black matrix (180, 480, 580) disposed on the same plane as the pattern buffer layer (160, 260, 360, 460, 560) and dividing each of the plurality of color filters (171, 172, 173, 174), wherein the pattern buffer layer (160, 260, 360, 460, 560) includes a plurality of pattern blocks (161 to 164, 261 to 264, 361 to 364, 461 to 464, 561 to 564) that are spaced apart from each other and each of the plurality of pattern blocks is disposed so as to overlap the plurality of sub pixels (SP1, SP2, SP3, SP4) to have an island shape, wherein the plurality of color filters (171, 172, 173, 174) is disposed on the pattern buffer layer so as to correspond to the plurality of pattern blocks (161 to 164), respectively, and a width of each of the plurality of pattern blocks (161 to 164) is larger than a width of each of the plurality of color filters (171, 172, 173, 174), and wherein each color filter (171, 172, 173, 174) is disposed so as to be in direct contact with an upper portion of a corresponding pattern block of the plurality of pattern blocks (161 to 164, 261 to 264, 361 to 364, 461 to 464, 561 to 564) and at least a portion of the black matrix (180, 480, 580) is disposed in direct contact with the upper surface of each of the plurality of pattern blocks (161 to 164, 261 to 264, 361 to 364, 461 to 464, 561 to 564) in the display area. an organic light emitting display panel including a plurality of sub pixels (SP1, SP2, SP3, SP4) in a display area; a pattern buffer layer (160, 260, 360, 460, 560) disposed on the organic light emitting display panel and patterned so as to overlap at least one sub pixel of the plurality of sub pixels (SP1, SP2, SP3, SP4); a color filter layer disposed on the pattern buffer layer (160, 260, 360, 460, 560) and including a plurality of color filters (171, 172, 173, 174) corresponding to the plurality of sub pixels (SP1, SP2, SP3, SP4); and a black matrix (180, 480, 580) disposed on the same plane as the pattern buffer layer (160, 260, 360, 460, 560) and dividing each of the plurality of color filters (171, 172, 173, 174), wherein the pattern buffer layer (160, 260, 360, 460, 560) includes a plurality of pattern blocks (161 to 164, 261 to 264, 361 to 364, 461 to 464, 561 to 564) that are spaced apart from each other and each of the plurality of pattern blocks is disposed so as to overlap the plurality of sub pixels (SP1, SP2, SP3, SP4) to have an island shape, wherein the plurality of color filters (171, 172, 173, 174) is disposed on the pattern buffer layer so as to correspond to the plurality of pattern blocks (161 to 164), respectively, and a width of each of the plurality of pattern blocks (161 to 164) is larger than a width of each of the plurality of color filters (171, 172, 173, 174), and wherein each color filter (171, 172, 173, 174) is disposed so as to be in direct contact with an upper portion of a corresponding pattern block of the plurality of pattern blocks (161 to 164, 261 to 264, 361 to 364, 461 to 464, 561 to 564) and at least a portion of the black matrix (180, 480, 580) is disposed in direct contact with the upper surface of each of the plurality of pattern blocks (161 to 164, 261 to 264, 361 to 364, 461 to 464, 561 to 564) in the display area.