A mobile terminal (10) has the touch screen TS capable of displaying an object Ob. A CPU (24) of the mobile terminal determines (S1, S3, S21), when an operation that is slid from an end of a touch screen TS to an inner side is performed, that the operation is a specific slide operation, and corresponding to determination of the specific slide operation, displays (S27, S35) a function icon FI related to a user interface function such as a cursor and an voice input in an area that can be touched in the specific slide operation to the touch screen TS afterward. Then, the CPU starts (S37, S39, S43, S59) the interface function related to the function icon FI when a present touch position PTP of the specific slide operation enters in a display area of the function icon FI.