A packet communication charge pre-notification system includes a mobile station, a packet communication network containing a mobile communication network connected to the mobile station by radio, and a terminal connected to the mobile station via the packet communication network. The mobile station has a control unit, counting unit, and display unit. The control unit forms packet data from digital data and transmits the packet data to the terminal via the packet communication network in accordance with transmission permission from the user. The counting unit counts the formed packet data before transmission. The display unit displays a communication charge calculated on the basis of the counting result of the counting unit before the packet data is transmitted.