1. An object detecting device comprising: an image capture unit configured to capture images within a predetermined range and acquires image data; a radar detecting unit configured to irradiate 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 configured to detect 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 configured to search the image data captured by the image capture unit, referring to the detection point data detected by the radar detecting unit, and detect an image portion corresponding to the target object to be detected; a detection point extracting device configured to extract, from the detection point data detected by the radar detecting unit, detection point data corresponding to the target object to be detected after the image portion search device has detected an image corresponding to the target object to be detected; and an image portion correcting device configured to correct, 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.