The present invention relates to an electronic device capable of operating multiple functions simultaneously, and enables to operate another function on which operational restriction has been put, with no decline in security features, even while operating a particular function. The electronic device is an electronic device (e.g., mobile terminal device 2) capable of operating another function while operating one function and capable of setting operational restriction for each function, comprising a control part (processor 6) that accepts said another function calling while operating said one function, and that releases the operational restriction based on the judgment of the authentication information in the case where the operational restriction has been set to said another function being called.