To provide a shield plate having high antifogging properties low in manufacturing cost and a helmet provided with the shield.

This shield plate has electrodes 33 and 34 on a transparent conductive film installed on a transparent plate of the shield plate 24, and the electrodes have metal foils extending along the transparent conductive film while electrically connected to the transparent conductive film. As the result, resistances of the electrodes 33 and 34 are low and voltage drops are not incident to the electrodes 33 and 34. The voltage loaded between the electrodes 33 and 34 is effectively loaded to the transparent conductive film, the transparent plate is effectively heated in spite of the source voltage is not high and the antifogging properties are sufficient.