To solve a problem that focusing is not attained because a hunting phenomenon occurs in the case of automatically bringing a low-contrast solid substance into focus.

This image pickup device is provided with a photographic optical system 1 capable of performing driving to attain focusing on a photographing object 12, an imaging device 2 photoelectrically converting the image of the object 12 formed by the optical system 1, a plurality of light emitting means 9 and 10 radiating light to the object 12, and a control means 4 selectively turning on the light emitting means 9 and 10 and performing the focusing driving of the optical system 1 based on a signal outputted from the device 2 when turning on the respective light emitting means 9 and 10. If focusing is not attained though the focusing driving is performed by selectively turning on the light emitting means 9 and 10, the optical system 1 is focused on an original platen 11.