To provide a protective sheet capable of effectively preventing neutrality, flaking and the like caused by exposure of a structural material to outside air and capable of preventing discoloration and discoloration of the protective sheet itself, Provided is a protective sheet that is less likely to cause powdering, component change, and the like, and that can be efficiently and simply disposed on a structural material. A method of manufacturing a protective sheet disposed on a surface of an object, having a light absorption coefficient in a predetermined range for ultraviolet light and having an oxygen transmission in a predetermined range, the method comprising: Introducing argon gas to a vacuum chamber at a predetermined range of vacuum arrival pressure, A method for producing a carbon material electrode, comprising: Applying a pulse voltage to a carbon material electrode as a target electrode to sputter carbon atoms of the carbon material electrode on...

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