An electronic device includes a first assembly including a window defining an appearance of a front surface of the electronic device; a display module disposed below the window; a touch sensor disposed between the window and the display module; a heat dissipation sheet disposed below the display module and having an opening; a support frame supporting the display module and including an opening area; a fingerprint sensor disposed in the opening of the support frame and the opening of the heat dissipation sheet; and a second assembly coupled to the first assembly, which includes a case forming an appearance of the electronic device and an inner space of the electronic device with the first assembly; a power supply unit accommodated in the inner space of the electronic device; and a circuit board accommodated in the inner space of the electronic device and including a controller.