ELECTRONIC DEVICE COMPRISING THERMAL DIFFUSION MEMBER

An electronic device according to various embodiments of the present disclosure comprises a first housing including a first support member and a second support member; a second housing slidably coupled to the first housing; a sliding plate having a first end coupled to the first support member, and having a second end arranged to slide at least partially in the second housing; a printed circuit board which is arranged between the first support member and the second support member, and which has at least one heat-generating component mounted on one surface thereof; a sliding driving unit, which is arranged on an inner surface of the sliding plate, has a first end coupled to the first support member, and has a second end coupled to one side surface of the sliding plate; a thermal diffusion member having a first side surface coupled to the first support member, and having a second side surface coupled to at least a portion of the sliding driving unit; and a flexible display supported by the first support member and the sliding plate, wherein the thermal diffusion member can be formed to be unfolded according to a sliding-out operation of the sliding driving unit and diffuse, to the outside, heat generated from the at least one heat-generating component. Other various embodiments are possible.