A moving-body-detecting device (1, 2, 3) for detecting a moving body in the surroundings of a vehicle, wherein the moving-body-detecting device (1, 2, 3) is comprising: image-capturing means installed on-board a vehicle, for capturing an image of the rear side of the vehicle; image conversion means for viewpoint conversion of a captured image obtained by the image-capturing means, into a bird's-eye view image; and differential image generating unit for position alignment, in bird's-eye view, of the positions of bird's-eye view images obtained at different times by the image-capturing means, for generating a differential image, based on bird's eye view images; characterized in that the moving-body-detecting device (1, 2, 3) further comprises differential-waveform-generating means for counting the number of pixels lying on a predetermined line and exhibiting a predetermined differential in the differential image of the position-aligned bird's-eye view images, and creating a frequency distribution, to thereby generate differential waveform information; three-dimensional-object-detecting means for detecting, based on the differential waveform information, a three-dimensional object that is possibly a moving body and that is present within a predetermined area, and calculating the movement speed of the three-dimensional object from temporal change of the waveform of the differential waveform information; moving-body-detecting means (34, 34a) for detecting, based on the movement speed of the three-dimensional object, whether or not the three-dimensional object detected by the three-dimensional-object-detecting means is a moving body; turn-detecting means for detecting turning of the vehicle; and control means that, in cases where turning of the vehicle has been detected by the turn-detecting means, suppresses detection of the three-dimensional object as the moving object by the moving-body-detecting means (34, 34a), as compared with cases in which the vehicle is not turning. image-capturing means installed on-board a vehicle, for capturing an image of the rear side of the vehicle; image conversion means for viewpoint conversion of a captured image obtained by the image-capturing means, into a bird's-eye view image; and differential image generating unit for position alignment, in bird's-eye view, of the positions of bird's-eye view images obtained at different times by the image-capturing means, for generating a differential image, based on bird's eye view images; characterized in that the moving-body-detecting device (1, 2, 3) further comprises differential-waveform-generating means for counting the number of pixels lying on a predetermined line and exhibiting a predetermined differential in the differential image of the position-aligned bird's-eye view images, and creating a frequency distribution, to thereby generate differential waveform information; three-dimensional-object-detecting means for detecting, based on the differential waveform information, a three-dimensional object that is possibly a moving body and that is present within a predetermined area, and calculating the movement speed of the three-dimensional object from temporal change of the waveform of the differential waveform information; moving-body-detecting means (34, 34a) for detecting, based on the movement speed of the three-dimensional object, whether or not the three-dimensional object detected by the three-dimensional-object-detecting means is a moving body; turn-detecting means for detecting turning of the vehicle; and control means that, in cases where turning of the vehicle has been detected by the turn-detecting means, suppresses detection of the three-dimensional object as the moving object by the moving-body-detecting means (34, 34a), as compared with cases in which the vehicle is not turning.