Disclosed is a mobile terminal having a security function. The mobile terminal having a security function according to the present invention comprises: a case unit having a keypad for inputting data; a substrate unit, disposed inside the case unit, having a data input switch part operated by a keypad; and a tamper-resistant unit, disposed between a keypad and the data input switch part, having a tamper-proof conductive track part electrically connected to the substrate unit, wherein the tamper-proof unit includes a switch shielding part for shielding the data input switch part, and a connecting part for connection, connected to the switch shielding part and electrically connected to the substrate unit.