Referring to FIGS. 9 and 10, an electronic device 900 according to an embodiment may include a housing 910 including a first surface (or a front surface) 910A, a second surface (or a rear surface) 910B, and a side surface 910C surrounding a space between the first surface 910A and the second surface 910B. In another embodiment (not illustrated), a housing may refer to a structure that forms a part of the first surface 910A, the second surface 910B, and the side surface 910C of FIG. 9. According to an embodiment, the first surface 910A may be implemented with a front plate 902 (e.g., a glass plate including various coating layers, or a polymer plate), at least a portion of which is substantially transparent. The second surface 910B may be implemented with a rear plate 911 that is substantially opaque. For example, the rear plate 911 may be implemented with a coated or colored glass, a ceramic, a polymer, a metal (e.g., aluminum, stainless steel (STS), or magnesium), or a combination of at least two of the materials. The side surface 910C may be coupled with the front plate 902 and the rear plate 911, and may be formed by a side bezel structure (or a “side member”) 918 including metal and/or polymer. In an embodiment, the back plate 911 and the side bezel structure 918 may be integrally formed and may include the same material (e.g., a metal material such as aluminum).