OBJECT DETECTION DEVICE

Provided is an object detection device that can improve the accuracy of identifying a detection target even when the detection target is far away. A three-dimensional object candidate region extracting means 2 extracts, from an image, a three-dimensional object candidate region indicating a region in which an object is present, by grouping pixels according to parallax associated with the pixels or a distance corresponding thereto. A detection target candidate region enlarging means 3 calculates, from an actual size of the detection target (Height_Obj, Width_Obj) and a distance Z, an image size (height_k, width_k) indicating a size of the detection target (e.g., a bike) when the detection target is assumed to be present at the distance Z, and changes a size of the three-dimensional object candidate region to greater than or equal to the image size. A detection target identifying means 4 identifies whether an object within the three-dimensional object candidate region which has had its size changed is the detection target.