Disclosed is a portable communication device that includes a housing including a first housing portion and a second housing portion at least partially overlapped and slidable with each other; a rollable module accommodated in the housing substantially between the first housing portion and the second housing portion, the rollable module configured to slide the first housing portion or the second housing portion with respect to each other; and a flexible display accommodated in the housing such that, when in a closed state in which the first housing portion or the second housing portion is not slid with respect to each other, a first display portion of the flexible display is visually exposed via a first surface of the housing and a second display portion of the flexible display is visually exposed via a second surface of the housing opposite to the first surface.