According to an embodiment of the present invention, the mobile terminal includes, a terminal body, a printed circuit board (PCB) mounted in the interior of the terminal body, and an internal antenna connected to the PCB, and configured to transmit and receive signals, wherein the internal antenna includes a ground formed on the PCB, a radiator connected to the ground and configured to be operable at a first band, and to feed the signals to the PCB, and a ground extension part extending in at least one direction from the ground, and configured to expand a ground surface of the ground in order for the internal antenna to include a second band, which is lower than a first band, as an operation band.