An electronic device is provided. The electronic device includes a housing on which at least a part of an external device operating communication in a frequency band of 20 GHz or higher is mounted, support members comprising a first support member connected to an area of the housing so as to support wearing of the electronic device in an area of the user's head while surrounding at least a part of the horizontal circumference of the user's head, and a second member surrounding at least a part of the vertical circumference of the user's head, and an antenna module disposed in an area of the second support member. The antenna module comprises an antenna layer comprising multiple patch antenna elements, a wireless circuit layer laminated on the lower portion of the antenna layer, and a heat-radiating layer laminated on the lower portion of the wireless circuit layer.