A yarn supplying bobbin feeding device comprising: a yarn supplying bobbin transport device configured to transport a plurality of yarn supplying bobbins on which a yarn has been wound; a yarn supplying bobbin aligning device configured to align the yarn supplying bobbins and that is arranged downstream of the yarn supplying bobbin transport device in a transport direction of the yarn supplying bobbins; and a yarn end cutting device that includes a cutting member for cutting yarn ends extending from the yarn supplying bobbins and that is arranged between the yarn supplying bobbin transport device and the yarn supplying bobbin aligning device in the transport direction, wherein the yarn end cutting device includes a suction member having a suction vent connected to a suction source and configured to suck the yarn ends by the action of a negative pressure supplied thereto by the suction source via the suction vent; a connecting member (71, 72) in which a communication path connecting the suction vent and the suction source is formed; and an opening/closing member capable of switching, by opening and closing at least one of the suction vent and the communication path, the suction member between a supply state in which the negative pressure is supplied via the suction vent and a non-supply state in which the negative pressure is not supplied via the suction vent. a yarn supplying bobbin transport device configured to transport a plurality of yarn supplying bobbins on which a yarn has been wound; a yarn supplying bobbin aligning device configured to align the yarn supplying bobbins and that is arranged downstream of the yarn supplying bobbin transport device in a transport direction of the yarn supplying bobbins; and a yarn end cutting device that includes a cutting member for cutting yarn ends extending from the yarn supplying bobbins and that is arranged between the yarn supplying bobbin transport device and the yarn supplying bobbin aligning device in the transport direction, wherein the yarn end cutting device includes a suction member having a suction vent connected to a suction source and configured to suck the yarn ends by the action of a negative pressure supplied thereto by the suction source via the suction vent; a connecting member (71, 72) in which a communication path connecting the suction vent and the suction source is formed; and an opening/closing member capable of switching, by opening and closing at least one of the suction vent and the communication path, the suction member between a supply state in which the negative pressure is supplied via the suction vent and a non-supply state in which the negative pressure is not supplied via the suction vent. a suction member having a suction vent connected to a suction source and configured to suck the yarn ends by the action of a negative pressure supplied thereto by the suction source via the suction vent; a connecting member (71, 72) in which a communication path connecting the suction vent and the suction source is formed; and an opening/closing member capable of switching, by opening and closing at least one of the suction vent and the communication path, the suction member between a supply state in which the negative pressure is supplied via the suction vent and a non-supply state in which the negative pressure is not supplied via the suction vent.