A moving-body-detecting device for detecting a moving body in the surroundings of a vehicle (V), wherein the moving-body-detecting device is comprising: image-capturing means installed on-board a vehicle (V), for capturing an image of the rear side of the vehicle (V); image conversion means for viewpoint conversion of a captured image obtained by the image-capturing means, into a bird's-eye view image (PB); and differential image generating unit for position alignment, in bird's-eye view, of the positions of bird's-eye view images (PB) obtained at different times by the image-capturing means , for generating a differential image (PD), based on bird's eye view images (PB); characterized in that the moving-body-detecting device 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 (PD) of the position-aligned bird's-eye view images (PB), 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 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 (V); and control means that, in cases where turning of the vehicle (V) 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 , as compared with cases in which the vehicle (V) is not turning. image-capturing means installed on-board a vehicle (V), for capturing an image of the rear side of the vehicle (V); image conversion means for viewpoint conversion of a captured image obtained by the image-capturing means, into a bird's-eye view image (PB); and differential image generating unit for position alignment, in bird's-eye view, of the positions of bird's-eye view images (PB) obtained at different times by the image-capturing means , for generating a differential image (PD), based on bird's eye view images (PB); characterized in that the moving-body-detecting device 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 (PD) of the position-aligned bird's-eye view images (PB), 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 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 (V); and control means that, in cases where turning of the vehicle (V) 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 , as compared with cases in which the vehicle (V) is not turning. <EOS>