An electronic apparatus including a housing; a plurality of accommodating portions, formed in the housing, each having an opening portion that opens towards an outside of the housing; an electronic component unit having a unit body accommodated in at least one first accommodating portion among the plurality of accommodating portions, and a unit cover that is installed on the opening portion of the first accommodating portion and that has a first connection opening connecting an inside and an outside of the first accommodating portion; and a dummy cover that is installed on the opening portion of a second accommodating portion different from the first accommodating portion among the plurality of accommodating portions, and that has a second connection opening connecting an inside and an outside of the second accommodating portion.