A mobile terminal is provided. The mobile terminal has a case, a top button located in a surface of the case, the top button including a light blocking part and a light transmitting part formed at a circumferential portion of the light blocking part, the top button having a front side exposed through the surface of the case and back side opposite the front side, a metal dome arranged at the back side of the top button, the metal dome having a projected center, an actuator configured to press the projected center of the metal dome to deform the metal dome when the top button is pressed, a circuit board having the metal dome seated on a side thereof, a light source mounted at the circuit board and a light guide layer configured to direct the light of the light source toward the surface of the case.