An electronic device according to various embodiments of the disclosure may include: a first housing including a first conductive portion, a first non-conductive portion, and a first segmented portion extending from the first conductive portion, a second housing configured to accommodate at least a portion of the first housing and to guide a slide movement of the first housing, the second housing including a second conductive portion, and a flexible display including a first area connected to the first housing and a second area extending from the first area and configured to be bendable or rollable, wherein, from a slide-in state to a slide-out state of the first housing with respect to the second housing, the first conductive portion and the second conductive portion may be spaced apart from each other, and in the slide-in state of the first housing with respect to the second housing, at least a portion of the first non-conductive portion may overlap the second conductive portion.