An image pickup apparatus is an image pickup apparatus capable of acquiring an image of an object in gas and in liquid, the image pickup apparatus including: an image pickup optical system (11)； an image pickup device (12)； a controlling portion (28) configured to make an in-gas judgment if a vignetting portion is detected in an image signal and make an in-liquid judgment if a vignetting portion is not detected in the image signal； and a display data generating portion (22) configured to generate certain display data corresponding to in-gas image pickup from the image signal if the in-gas judgment is made and generate other display data corresponding to in-liquid image pickup from the image signal if the in-liquid judgment is made.
