[Object] It is desirable to provide a technology capable of further appropriately adjusting the luminance of the endoscopic image. [Solution] Provided is an image processing device including: an area extraction unit configured to extract, as an extraction area, an area corresponding to the size of an insertion unit from an endoscopic image based on imaging by an image sensor； and an exposure control unit configured to perform exposure control on a basis of an output value of the image sensor in the extraction area.
