To allow an information terminal t make a call to only a specific opposite party even when call-out is suppressed for saving a call tariff charge and to accurately display the call tariff charge.

In the case of dialing, a main control section 3 allows a call tariff information monitor and dialing suppression section 10 to discriminate whether or not a total communication charge (total communication call unit) descried in a call tariff information memory 9 exceeds a predetermined upper limit amount (restriction object call unit). When the total communication charge exceeds the upper limit amount, the main control section 3 inhibits a dial control section 6 to make dialing. However, the main control section 3 permits the dialing control section 6 to make dialing to an opposite party to which exception is set in a telephone directory memory 8 without performing this discrimination. Furthermore, a dialing suppress/release control section 11 sends an instruction to the charging information monitor and call-out suppression section 10 at a start date of an incrementation period to reset the total communication charge stored in the call tariff charging information memory 9.