An electronic device is provided. The electronic device includes a housing including a front plate and a rear plate; a touch screen display operably coupled to the front plate; at least one through-hole operably disposed on the front plate; and an imaging sensor assembly facing the front plate at an acute angle with respect to the front plate. The imaging sensor assembly includes a barrel at least partially disposed in the through-hole; a plurality of lenses disposed inside the barrel; a sensor housing surrounding at least part of an outer surface of the barrel; an image sensor assembly comprising an image sensor disposed inside the sensor housing; and a processor electrically coupled to the image sensor and configured to detect an iris image.