[Object] To provide an eyeball observation device, which can stably detect a line of sight.[Solution] Provided is an eyeball observation device including: at least one infrared light source configured to radiate polarized infrared light onto an eyeball of a user and at least one imaging device configured to capture an image of the eyeball irradiated with the polarized infrared light and to be capable of simultaneously capturing a polarization image with at least three directions.
