A manufacturing method of an organic light emitting diode (“OLED”) display includes: forming a contact pattern on a panel region of a surface of a board glass, where the board glass includes the panel region, and a peripheral area which surrounds the panel region; contacting the paper glass with a surface of the contact pattern corresponding to the panel region and the surface of the board glass corresponding to the peripheral area; adhering the surface of the board glass corresponding to the peripheral area to a surface of the paper glass; forming an organic light emitting element on the paper glass corresponding to the panel region; and separating the paper glass from the board glass by cutting the paper glass at a position corresponding to an end portion of the panel region adjacent to the peripheral area.