1. An object detecting device comprising: an image capture unit which captures images within a predetermined range and acquires image data; a radar detecting unit which irradiates an object with electromagnetic waves in a plurality of different directions within the predetermined range and acquires, for each of the irradiation directions of the electromagnetic waves, detection point data including data of the distance to an object existing in the direction; and an object detecting unit which detects a predetermined target object to be detected, based on the image data captured by the image capture unit and the detection point data detected by the radar detecting unit, wherein the object detecting unit comprises: an image portion search device which searches the image data captured by the image capture unit, referring to the detection point data detected by the radar detecting unit, and detects an image portion corresponding to the target object to be detected; a detection point extracting device which extracts, from the detection point data detected by the radar detecting unit, detection point data corresponding to the target object to be detected; and an image portion correcting device which corrects, in accordance with the detection point data extracted by the detection point extracting device, the position of the image portion detected by the image portion search device.