a first housing;

a second housing slidably combined with the first housing;

a display fixed at least in part to the second housing and having an visible display area increasing or decreasing in response to a sliding of the second housing, wherein the visible display area is a portion viewed from an outside of the electronic device; and

a support structure having a bendable structure, supporting at least a portion of the display, and moving in response to the sliding of the second housing, the support structure comprising one or more support members, and a guide rail,

wherein each one of the one or more the support members include:

a base member extending in a first direction perpendicular to a sliding direction of the second housing and arranged along the sliding direction, and connected to the guide rail, wherein the guide rail guides the movement of the base member;

a moving member inserted at least in part into a receiving groove formed in the base member, and

a fixing member fixing the base member and the moving member to the display, wherein the moving member is inserted into the receiving groove to be floatable with respect to the base member.