An electronic device may include a housing including a first surface, a second surface, and a side surface, a camera module disposed at a position aligned with an opening formed in the first surface, a decorative member including a first portion connected to the first surface at a position at which the opening is formed and having a hollow, a second portion extending from the first portion and surrounding the hollow, and a window seated on the second portion, a processor, and a memory, wherein the camera module includes at least one lens, and a lens barrel including a cylindrical lower portion, an extension portion extending from the lower portion, and a cylindrical upper portion extending from the extension portion, and the distance from the lower portion to the first portion is smaller than the distance from the upper portion to the window.