An image processing apparatus according to the present disclosure includes: an image processor configured to generate movie data based on image capturing data obtained in response to a shooting instruction that has been given by a user; and a controller configured to write the movie data on a storage medium. When any movie file has already been written on the storage medium, and when the movie data is related to the existent movie file or when the user decides to add the movie data, the controller adds the movie data to the existent movie file.