An image processing device that measures a relative distance to an object or a relative speed by processing a plurality of images synchronously captured by a plurality of cameras, the object being present in the plurality of images, the image processing device comprising: an object pursuing unit that performs a pursuing process to derive first current position information of the object on the basis of one of the plurality of images and past position information of the object; a first distance calculation unit that calculates a first relative distance to the object on the basis of the first current position information and at least two of the plurality of images; a parallax information obtaining unit that obtains parallax information from at least two of the plurality of images, an object detection unit that detects the object by deriving second current position information of the object on the basis of the parallax information; a second distance calculation unit that calculates a second relative distance to the object on the basis of a detection result of the object; and a correction processing unit that corrects at least one of the first current position information, the second current position information, the first relative distance and the second relative distance on the basis of at least one of the first current position information derived by the object pursuing unit and the second current position information derived by the object detection unit, and the first relative distance calculated by the first distance calculation unit and the second relative distance calculated by the second distance calculation unit, characterized in that: a processing start time of the object pursuing unit is set to be before a processing ending time of the parallax information obtaining unit, and a processing start time of the first distance calculation unit is set to be before a processing ending time of the object detection unit. an object pursuing unit that performs a pursuing process to derive first current position information of the object on the basis of one of the plurality of images and past position information of the object; a first distance calculation unit that calculates a first relative distance to the object on the basis of the first current position information and at least two of the plurality of images; a parallax information obtaining unit that obtains parallax information from at least two of the plurality of images, an object detection unit that detects the object by deriving second current position information of the object on the basis of the parallax information; a second distance calculation unit that calculates a second relative distance to the object on the basis of a detection result of the object; and a correction processing unit that corrects at least one of the first current position information, the second current position information, the first relative distance and the second relative distance on the basis of at least one of the first current position information derived by the object pursuing unit and the second current position information derived by the object detection unit, and the first relative distance calculated by the first distance calculation unit and the second relative distance calculated by the second distance calculation unit, characterized in that: a processing start time of the object pursuing unit is set to be before a processing ending time of the parallax information obtaining unit, and a processing start time of the first distance calculation unit is set to be before a processing ending time of the object detection unit. a processing start time of the object pursuing unit is set to be before a processing ending time of the parallax information obtaining unit, and a processing start time of the first distance calculation unit is set to be before a processing ending time of the object detection unit.