There is provided an electronic device includes a detachable battery pack from a casing; and a battery pack loading section in which the battery pack is loaded. The battery pack loading section includes a battery receiving surface that receives a battery and a peripheral wall that is formed at the peripheral edge of the battery receiving surface and faces the side surface of the battery. A connector to be connected to a battery terminal of the battery pack is disposed on the peripheral wall. A raised portion that is raised toward the battery pack is formed on the battery receiving surface and on the peripheral wall in the battery pack loading section. The battery pack has an elastic sealing member surrounding the battery terminal at a portion in contact with the raised portion in a manner disposed in the battery pack loading section.