An imaging apparatus having a lens or a mount unit for mounting a lens on an object side surface of an apparatus main body and a grip unit at an end portion on one side of the apparatus main body, includes a setting unit to set a prohibit state that prohibits changing a setting value, an operation member for changing the setting value, a temporary cancel member, and a control unit to perform control. Where the prohibit state is set and if the temporary cancel member has not been operated and the operation member has been operated, the control unit controls not to change the setting value. Where the prohibit state is set and if the temporary cancel member has been operated and the operation member has been operated, the control unit changes the setting value according to an operation performed on the operation member.