Provided is an electronic device including: a housing; a camera module oriented in a first direction inside the housing; a camera window arranged in front of the camera module in the first direction; a cover including an opening into which the camera window is insertable, the cover coupled to the housing; and a window frame supporting the camera window and mounted on the cover. The window frame includes: a frame body including a support portion arranged in the opening and supporting the camera window, and a mounting portion extending from the support portion in a second direction that is perpendicular to the first direction and overlapped by the cover in the first direction; a retention member retaining a first gap between the mounting portion and the cover in the first direction; and a waterproof body configured to be elastically deformed while arranged between the mounting portion and the cover.