The present invention relates to a remained roving bobbin exchanging device (3) for making all the roving bobbins (1a) to be transported to a roving frame into vacant bobbins (1b) and discloses the remained roving bobbin exchanging device (3) comprising a fixing or removal device (20) for detecting the bobbins having the remained rovings adhered thereto on the bobbin transporting line and exchanging them with vacant bobbins and a tray transporting device (50) for receiving the remained roving bobbins from the fixing or removal device (20) and supplying the vacant bobbins to the fixing or removal device, in which the tray transporting device (50) is made such that a tray can be circulated and at the same time the remained roving cutter device (60) and the remained roving removal device (40) are arranged to remove the remained roving from the remained roving bobbin.