A mobile unit 10 is provided with a called party number acquiring unit 102 for acquiring a called party number corresponding to a call origination command entered by a user, a number checking unit 103 for checking the called party number acquired by the called party number acquiring unit 102, against every origination-restricted number stored in an origination-restricted number storing unit 112, and an origination restricting unit 104 for restricting origination of a call on the basis of the result of the checking by the number checking unit 103.