A portable communication device (100, 200, 400), comprising: a housing including a front plate (112, 212) facing a first direction (f), a rear plate facing a second direction (r) opposite to the first direction, and a side surface which surrounds the front plate and the back plate and faces a third direction (s) orthogonal to the first and second direction, the front plate (112, 212) including a screen area (112a, 212a) and a bezel area (112b, 212b) a display (120, 220) visible through the screen area of the front plate; a first circuit board (140, 240) disposed between the display and the back plate and including a first surface (140a, 240a) facing to the display and a second surface (140b, 240b) facing to the back plate; a plurality of antenna arrays accommodated in the housing, the plurality of antenna arrays including: a first antenna array (150, 250) disposed in an area overlaid with the bezel area (112b, 212b), electrically connected to the first circuit board (140, 240); a second antenna array (170, 270) disposed on the second surface (140b,240b) of the first circuit board (140, 240); a third antenna array located adjacent to the side surface; a supporting member including a plurality of through holes isolating a plurality of antenna elements of the first antenna array (150, 250) from each other; and a wireless communication circuit (142, 242) disposed on the first circuit board (140, 240) and electrically connected with the first antenna array (150, 250) and the second antenna array (170, 270), the wireless communication circuit (142, 242) being configured to - form a beam having a directionality in the first direction using the first antenna array (150, 250); - form a beam having a directionality in the second direction using the second antenna array (170, 270); - form a beam having directionality in the third direction using the third antenna array; wherein the plurality of through holes includes a dielectric. a housing including a front plate (112, 212) facing a first direction (f), a rear plate facing a second direction (r) opposite to the first direction, and a side surface which surrounds the front plate and the back plate and faces a third direction (s) orthogonal to the first and second direction, the front plate (112, 212) including a screen area (112a, 212a) and a bezel area (112b, 212b) a display (120, 220) visible through the screen area of the front plate; a first circuit board (140, 240) disposed between the display and the back plate and including a first surface (140a, 240a) facing to the display and a second surface (140b, 240b) facing to the back plate; a plurality of antenna arrays accommodated in the housing, the plurality of antenna arrays including: a first antenna array (150, 250) disposed in an area overlaid with the bezel area (112b, 212b), electrically connected to the first circuit board (140, 240); a second antenna array (170, 270) disposed on the second surface (140b,240b) of the first circuit board (140, 240); a third antenna array located adjacent to the side surface; a supporting member including a plurality of through holes isolating a plurality of antenna elements of the first antenna array (150, 250) from each other; and a wireless communication circuit (142, 242) disposed on the first circuit board (140, 240) and electrically connected with the first antenna array (150, 250) and the second antenna array (170, 270), the wireless communication circuit (142, 242) being configured to - form a beam having a directionality in the first direction using the first antenna array (150, 250); - form a beam having a directionality in the second direction using the second antenna array (170, 270); - form a beam having directionality in the third direction using the third antenna array; a first antenna array (150, 250) disposed in an area overlaid with the bezel area (112b, 212b), electrically connected to the first circuit board (140, 240); a second antenna array (170, 270) disposed on the second surface (140b,240b) of the first circuit board (140, 240); a third antenna array located adjacent to the side surface; a supporting member including a plurality of through holes isolating a plurality of antenna elements of the first antenna array (150, 250) from each other; and a wireless communication circuit (142, 242) disposed on the first circuit board (140, 240) and electrically connected with the first antenna array (150, 250) and the second antenna array (170, 270), the wireless communication circuit (142, 242) being configured to - form a beam having a directionality in the first direction using the first antenna array (150, 250); - form a beam having a directionality in the second direction using the second antenna array (170, 270); - form a beam having directionality in the third direction using the third antenna array; - form a beam having a directionality in the first direction using the first antenna array (150, 250); - form a beam having a directionality in the second direction using the second antenna array (170, 270); - form a beam having directionality in the third direction using the third antenna array;