An imaging apparatus includes an imaging unit for capturing a subject and generating image data of the subject, an operation input unit for receiving inputs of operation signals containing a release signal for instructing the imaging unit to shoot, an acceleration detector for detecting an acceleration of the imaging apparatus, a state detector for separately detecting a case in which the imaging apparatus is overland, a case in which the imaging apparatus is underwater and a photographer shoots while swimming, and a case in which the imaging apparatus is underwater and the photographer shoots while changing a water depth, and a control unit for performing operation control depending on an input into the operation input unit and/or into the acceleration detector according to a state detection result by the state detector.