The present invention relates to an electronic device having an electronic device body 1 the surface of which is covered by a protective sheet. The protective sheet includes a multilayer structure including a base (X) and a layer (Y) stacked on the base (X). The layer (Y) includes a metal oxide (A), a phosphorus compound (B), and cations (Z) with an ionic charge (Fz) of 1 or more and 3 or less. The phosphorus compound (B) includes a compound containing a moiety capable of reacting with the metal oxide (A). In the layer (Y), the number of moles (N M ) of metal atoms (M) constituting the metal oxide (A) and the number of moles (N P ) of phosphorus atoms derived from the phosphorus compound (B) satisfy a relationship of 0.8 ‰¤ N M /N P ‰¤ 4.5, and N M , the number of moles (Nz) of the cations (Z), and Fz satisfy a relationship of 0.001 ‰¤ Fz × N Z /N M ‰¤ 0.60.