An organic light-emitting display device comprising: a substrate comprising an active area (A/A) and an inactive area (I/A) surrounding the active area (A/A); a first planarization layer on circuit elements in the active area (A/A) and in the inactive area (I/A); a second planarization layer on the first planarization layer; an organic light-emitting element on the second planarization layer in the active area (A/A); a bank on the second planarization layer so that it partially covers an anode of the organic light-emitting element; and a spacer on the bank, an encapsulation layer covering the organic light-emitting element, the encapsulation layer comprising a first inorganic layer, a second inorganic layer and a first organic member between the first inorganic layer and the second inorganic layer; a first structure spaced apart from the first planarization layer in the inactive area (I/A) and including a first support layer made of the same material as at least one of the first planarization layer and the second planarization layer; a first wall on the first support layer; a second structure positioned at an outer periphery of the first structure in the inactive area (I/A) and including a second support layer made of the same material as at least one of first planarization layer and the second planarization layer; a second wall on the second support layer; and a third wall positioned at an inner side of the second wall on the second support layer, a second organic member positioned between the second wall and the third wall, wherein each of the first wall, the second wall and the third wall comprises a lower layer (152-1, 156-1, 154-1) made of the same material as the bank, and an upper layer (152-2, 156-2, 154-2) made of the same material as the spacer. a substrate comprising an active area (A/A) and an inactive area (I/A) surrounding the active area (A/A); a first planarization layer on circuit elements in the active area (A/A) and in the inactive area (I/A); a second planarization layer on the first planarization layer; an organic light-emitting element on the second planarization layer in the active area (A/A); a bank on the second planarization layer so that it partially covers an anode of the organic light-emitting element; and a spacer on the bank, an encapsulation layer covering the organic light-emitting element, the encapsulation layer comprising a first inorganic layer, a second inorganic layer and a first organic member between the first inorganic layer and the second inorganic layer; a first structure spaced apart from the first planarization layer in the inactive area (I/A) and including a first support layer made of the same material as at least one of the first planarization layer and the second planarization layer; a first wall on the first support layer; a second structure positioned at an outer periphery of the first structure in the inactive area (I/A) and including a second support layer made of the same material as at least one of first planarization layer and the second planarization layer; a second wall on the second support layer; and a third wall positioned at an inner side of the second wall on the second support layer, a second organic member positioned between the second wall and the third wall, wherein each of the first wall, the second wall and the third wall comprises a lower layer (152-1, 156-1, 154-1) made of the same material as the bank, and an upper layer (152-2, 156-2, 154-2) made of the same material as the spacer.