An electronic device includes a first unit having an input part and a second unit having a display. The first unit and the second unit are detachably coupled, and the first unit includes a socket capable of housing a predetermined side of the second unit. A first insertion hole, into which a security member can be inserted, is provided on a side of the socket, and a second insertion hole, into which the security member can be inserted, is provided on a side of the second unit. The first insertion hole of the socket is provided on an upper part of the socket, and the second insertion hole of the second unit is provided on a lower part of the second unit.