A mobile communication terminal and a controlling method thereof are disclosed, by which reception performance of the mobile communication terminal can be enhanced while SAR is reduced. According to an embodiment, the terminal includes a body part comprising a circuit board having radio communication parts mounted thereon and a display to output images of prescribed information; a grounded part for selectively grounding at least one of the circuit board and the display; and a ground controlling part configured to enable at least one of the circuit board and the display to be selectively connected to the grounded part for grounding.