An organic light emitting display device comprising: a first overcoating layer on a driving transistor (Tdr) and a supply electrode , the first overcoating layer including a first contact hole and a second contact hole ; a connection electrode on the first overcoating layer and connected to the supply electrode through the second contact hole ; a first electrode on the first overcoating layer and connected to the driving transistor (Tdr) through the first contact hole ; a second overcoating layer on the first overcoating layer , the second overcoating layer covering the first and second contact holes and not covering a portion of the first electrode ; an auxiliary electrode on the second overcoating layer and connected to the connection electrode , wherein the second overcoating layer comprises a third contact hole , and the auxiliary electrode is connected to the connection electrode through the third contact hole ; an organic emission layer on the portion of the first electrode which is not covered by the second overcoating layer ; a second electrode on the organic emission layer and electrically connected to the auxiliary electrode ,. the second electrode overlapping the first electrode and the auxiliary electrode ; and a partition wall on an upper side of the auxiliary electrode , wherein the partition wall has a reverse taper structure where a width of a bottom of the partition wall is narrower than that of a top of the partition wall and the second electrode is disposed on the top of the partition wall but is not disposed in a partial area near a contact area where the partition wall contacts the auxiliary electrode , such that the second electrodes of adjacent sub pixels (P) are disconnected from each other. a first overcoating layer on a driving transistor (Tdr) and a supply electrode , the first overcoating layer including a first contact hole and a second contact hole ; a connection electrode on the first overcoating layer and connected to the supply electrode through the second contact hole ; a first electrode on the first overcoating layer and connected to the driving transistor (Tdr) through the first contact hole ; a second overcoating layer on the first overcoating layer , the second overcoating layer covering the first and second contact holes and not covering a portion of the first electrode ; an auxiliary electrode on the second overcoating layer and connected to the connection electrode , wherein the second overcoating layer comprises a third contact hole , and the auxiliary electrode is connected to the connection electrode through the third contact hole ; an organic emission layer on the portion of the first electrode which is not covered by the second overcoating layer ; a second electrode on the organic emission layer and electrically connected to the auxiliary electrode ,. the second electrode overlapping the first electrode and the auxiliary electrode ; and a partition wall on an upper side of the auxiliary electrode , wherein the partition wall has a reverse taper structure where a width of a bottom of the partition wall is narrower than that of a top of the partition wall and the second electrode is disposed on the top of the partition wall but is not disposed in a partial area near a contact area where the partition wall contacts the auxiliary electrode , such that the second electrodes of adjacent sub pixels (P) are disconnected from each other. <EOS>