A mobile terminal and a method to transmit a handover complete message in a handover process are provided. The handover method of the present invention includes determining, when a handover command message is received, a handover complete message transmission period, transmitting, when channel establishment information is received, a handover complete message during the handover complete message transmission period, and completing, when a handover complete message transmission period expires, handover to communicate with a base station to which the mobile terminal is handed over. The mobile terminal and handover method thereof are capable of transmitting the handover complete message repeatedly during a predetermined period, resulting in reduction of a probability of a handover failure.