To facilitate visual recognition of change of a focus adjustment value for automatic focus when the focus adjustment value is changed in an imaging device having a live view function.

When there is an instruction of changing an AF focus adjusting value used for live view, a Tv value, an Av value and an ISO value are determined on the basis of a program diagram for determining an exposure amount from brightness of a subject to execute a live view, and an enlarged image is displayed as a live view image at this time. When there is an operation of starting live view and there is no instruction of changing the AF focus adjustment value used for live view, the Tv value, the Av value and the ISO value are determined on the basis of the program diagram for determining the exposure amount form brightness of the subject are determined to execute live view in the case of non-manual mode, but live view is executed by using a Tv value, an Av value and an ISO value set by a user in the case of the manual mode.