Provided is a flexible organic light emitting display device (100) including a pixel area (A/A) and a bezel area (B/A). The flexible organic light emitting display device (100) includes: a first inorganic encapsulation layer (131) conformally configured on an organic light emitting element (140) of the pixel area (A/A) so as to protect the organic light emitting element (140) from oxygen and moisture; a second inorganic encapsulation layer (132) configured to be relatively flatter than the first inorganic encapsulation layer (131), protect the organic light emitting element (140) from oxygen and moisture, and encapsulate a plurality of foreign matter compensation layers (137, 133) by contacting the first inorganic encapsulation layer (131) in the bezel area (B/A); and a foreign matter compensation layer structure in which the plurality of foreign matter compensation layers (137, 133) is stacked between the first inorganic encapsulation layer (131) and the second inorganic encapsulation layer (132).