An electronic device is provided. The electronic device includes a first housing including a first space formed by a first side member including a first side, a second side extending in a direction perpendicular to the first side, and a third side extending from the second side in parallel with the first side, a second housing which is slidably coupled to the first housing in a first direction and includes a second space, a bendable member which is connected to the first housing, is at least partially accommodated into the second space in a slide-in state, and forms a plane that is at least partially identical to the first housing in a slide-out state, a flexible display including a first portion disposed to be viewable from an outside in the slide-in state and a second portion which extends from the first portion and is accommodated into the second space through the bendable member so as not to be at least partially viewable from the outside, and a component assembly which is disposed in the first space to correspond to the outside through an opening formed in at least a portion of the first housing and comprises at least two electronic components, wherein the opening may be covered by at least a portion of the second housing in the slide-in state, and in the slide-in state, the first side and the third side may be accommodated into the second space so as not to be viewable from the outside.