A flexible organic light emitting display device including a pixel area (A/A) and a bezel area (B/A), comprising: a first inorganic encapsulation layer , conformally configured on an organic light emitting element of the pixel area (A/A), covering the pixel area (A/A) and the bezel area (B/A) and configured to protect the organic light emitting element from oxygen and/or moisture; and a second inorganic encapsulation layer configured to be relatively flatter than the first inorganic encapsulation layer , protect the organic light emitting element from oxygen and moisture, encapsulate at least a first foreign matter compensation layer which is on the first inorganic encapsulation layer and covers the pixel area (A/A) and a portion of the bezel area (B/A) and a second foreign matter compensation layer which is on the first foreign matter compensation layer and covers the pixel area (A/A) and a portion of the bezel area (B/A) by being connected to or contacting the first inorganic encapsulation layer in the bezel area (B/A); wherein the first foreign matter compensation layer is made of flowable silicon oxycarbon (SiOC) and the second foreign matter compensation layer is made of dense silicon oxycarbon; wherein a carbon content of the first foreign matter compensation layer is larger than a carbon content of the second foreign matter compensation layer ; and wherein a hardness of the second foreign matter compensation layer is larger than that of the first foreign matter compensation layer ; and wherein a ratio of the thickness of the second foreign matter compensation layer and the thickness of the first foreign matter compensation layer is configured to be 1:2 to 4:1; and wherein the flexible organic light emitting display further comprising: a planarization foreign matter compensation layer disposed in a portion of the bezel area (B/A) and the pixel area (A/A) on the second inorganic encapsulation layer and made of an acryl resin, a silicon resin, or an epoxy resin. a first inorganic encapsulation layer , conformally configured on an organic light emitting element of the pixel area (A/A), covering the pixel area (A/A) and the bezel area (B/A) and configured to protect the organic light emitting element from oxygen and/or moisture; and a second inorganic encapsulation layer configured to be relatively flatter than the first inorganic encapsulation layer , protect the organic light emitting element from oxygen and moisture, encapsulate at least a first foreign matter compensation layer which is on the first inorganic encapsulation layer and covers the pixel area (A/A) and a portion of the bezel area (B/A) and a second foreign matter compensation layer which is on the first foreign matter compensation layer and covers the pixel area (A/A) and a portion of the bezel area (B/A) by being connected to or contacting the first inorganic encapsulation layer in the bezel area (B/A); wherein the first foreign matter compensation layer is made of flowable silicon oxycarbon (SiOC) and the second foreign matter compensation layer is made of dense silicon oxycarbon; wherein a carbon content of the first foreign matter compensation layer is larger than a carbon content of the second foreign matter compensation layer ; and wherein a hardness of the second foreign matter compensation layer is larger than that of the first foreign matter compensation layer ; and wherein a ratio of the thickness of the second foreign matter compensation layer and the thickness of the first foreign matter compensation layer is configured to be 1:2 to 4:1; and wherein the flexible organic light emitting display further comprising: a planarization foreign matter compensation layer disposed in a portion of the bezel area (B/A) and the pixel area (A/A) on the second inorganic encapsulation layer and made of an acryl resin, a silicon resin, or an epoxy resin. <EOS>