An electronic device including a fuel container to accumulate fuel inside thereof, a fuel cell device body unit engaged with the fuel container and comprising a power generating cell to generate electricity by using the fuel which is supplied from the fuel container and an electronic device body unit in which the electricity is supplied from the fuel cell device body unit, and the electronic device body unit comprises a case having a concave portion in which the fuel cell device body unit and the fuel container are housed, an opening part which forms an open end of the concave portion, and the fuel cell device body unit and the fuel container are engageable with and separable from each other and detachable from the concave portion in a state where the fuel cell device body unit and the fuel container are engaged to one another and only the fuel container is detachable from the concave portion.