A reel holding device which is configured to be used being combined with a feeder device that is capable of collecting components at a supply position by sending out a component storage tape (85, 86) which is configured to store each of the components in a plurality of component storage sections, and is configured to hold a plurality of component supply reels (81, 82) around which the component storage tapes (85, 86) are respectively wound to be rotatable and exchangeable, the device comprising: a case which is configured to accommodate the plurality of component supply reels (81, 82) to be aligned in a direction of a reel axial line; outer circumferential support members (41, 42, 51, 52) which are built between two side walls (31, 32) of the case, and are configured to support outer circumferences of the plurality of component supply reels (81, 82) to be rotatable such that the reel axial lines are identical to each other; and a deviation preventing member (43, 53) which is built between the two side walls (31, 32), faces the outer circumferences of the plurality of component supply reels (81, 82), and is configured to prevent the component supply reels (81, 82) from deviating from the outer circumferential support members (41, 42, 51, 52), and at least one of the outer circumferential support members (41, 42, 51, 52) and the deviation preventing member (43, 53) is an integrated rod-like member which has a smooth surface that abuts against the outer circumferences of the plurality of component supply reels (81, 82) and is built between the two side walls (31, 32) characterized in that: the integrated rod-like member is a freely rotatable rod-like roller member, and has a diameter-reducing section at both ends of the rod-like roller member, which is wider than a thickness of reel flanges that respectively form the component supply reels (81, 82) at both of end parts, and is narrower than a separation distance of the two reel flanges. a case which is configured to accommodate the plurality of component supply reels (81, 82) to be aligned in a direction of a reel axial line; outer circumferential support members (41, 42, 51, 52) which are built between two side walls (31, 32) of the case, and are configured to support outer circumferences of the plurality of component supply reels (81, 82) to be rotatable such that the reel axial lines are identical to each other; and a deviation preventing member (43, 53) which is built between the two side walls (31, 32), faces the outer circumferences of the plurality of component supply reels (81, 82), and is configured to prevent the component supply reels (81, 82) from deviating from the outer circumferential support members (41, 42, 51, 52), and at least one of the outer circumferential support members (41, 42, 51, 52) and the deviation preventing member (43, 53) is an integrated rod-like member which has a smooth surface that abuts against the outer circumferences of the plurality of component supply reels (81, 82) and is built between the two side walls (31, 32) characterized in that: the integrated rod-like member is a freely rotatable rod-like roller member, and has a diameter-reducing section at both ends of the rod-like roller member, which is wider than a thickness of reel flanges that respectively form the component supply reels (81, 82) at both of end parts, and is narrower than a separation distance of the two reel flanges.