An image device is adapted to control an image-capturing section and a display section. The image-capturing section captures an image of a subject and generate image-capture data in synchronization with a first vertical synchronization signal. The display section displays an image on the basis of image data in synchronization with a second vertical synchronization signal. The image device includes an image-data-generation section configured to generate the image data on the basis of the image-capture data, and a timing generator configured to output the first vertical synchronization signal and the second vertical synchronization signal. The second vertical synchronization signal is outputted after a predetermined period from a timing at which the first vertical synchronization signal is outputted. The predetermined period is shorter than a period of one cycle of the first vertical synchronization signal and variable. The first vertical synchronization signal and the second vertical synchronization signal are synchronized.