A mobile terminal includes a display unit configured to display a screen generated by combining plural screen layers, four controllers connected to the display unit; wherein a first controller determines whether a transmission specification of a subject screen layer to be updated is enabled upon updating of the screen, a second controller determines whether a size of the subject screen layer to be updated is equal to or larger than a size of a screen displayed by the display unit when the first controller determines “YES”, a third controller determines whether the screen layer to be combined on a back surface of the subject screen layer to be updated exists when the second controller determines “YES”; and a fourth controller controls to disable the transmission specification of the subject screen layer to be updated when the third controller determines “NO”.