A parts feeding device adapted to be placed adjacent to a working device capable of retrieving parts housed in a tray using a head having a predetermined movable range, comprising: a magazine which includes a plurality of pallets each having the tray mounted thereon, the pallets being housed in a state of being arranged in a vertical direction so as to be inserted and removed in a horizontal first direction; a parts feeding table which is placed opposite to the magazine in the first direction, and which can support the pallets that are pulled out from the magazine; and a relay device which is provided movably in a vertical direction at a position between the magazine and the parts feeding table, and which delivers the pallets in the first direction between the magazine and the parts feeding table, wherein the parts feeding table includes a support member having pallet supporting portions of a plurality of levels for supporting the plurality of pallets, and an elevating mechanism (30, 410) for synchronously moving, in the vertical direction, the plurality of pallets supported by the support member in a state where a positional relation of the plurality of pallets is maintained, the support member supports the pallets in a state where the plurality of pallets are arranged in the vertical direction, and in a state where a tray mounted on a topmost pallet, among the plurality of pallets, is adapted to be positioned within the movable range of the head and an upside of the tray is open, the relay device includes a guiding portion for guiding the pallets in the first direction, and an insertion/removal head (25A, 25B) which is provided movably in the first direction and which includes an engaging portion that can be displaced to a position capable of engaging with the pallets and a position of retracting below the pallets, the pallets each include, as engaged portions of the insertion/removal head, a first engaged portion provided to one end of the pallet in the first direction and a second engaged portion provided to another end, and the relay device inserts and removes the pallets into and from the magazine by moving the insertion/removal head in the first direction in a state where the engaging portion is engaged with the first engaged portion, and inserts and removes the pallets into and from the parts feeding table by moving the insertion/removal head in the first direction in a state where the engaging portion is engaged with the second engaged portion. a magazine which includes a plurality of pallets each having the tray mounted thereon, the pallets being housed in a state of being arranged in a vertical direction so as to be inserted and removed in a horizontal first direction; a parts feeding table which is placed opposite to the magazine in the first direction, and which can support the pallets that are pulled out from the magazine; and a relay device which is provided movably in a vertical direction at a position between the magazine and the parts feeding table, and which delivers the pallets in the first direction between the magazine and the parts feeding table, wherein the parts feeding table includes a support member having pallet supporting portions of a plurality of levels for supporting the plurality of pallets, and an elevating mechanism (30, 410) for synchronously moving, in the vertical direction, the plurality of pallets supported by the support member in a state where a positional relation of the plurality of pallets is maintained, the support member supports the pallets in a state where the plurality of pallets are arranged in the vertical direction, and in a state where a tray mounted on a topmost pallet, among the plurality of pallets, is adapted to be positioned within the movable range of the head and an upside of the tray is open, the relay device includes a guiding portion for guiding the pallets in the first direction, and an insertion/removal head (25A, 25B) which is provided movably in the first direction and which includes an engaging portion that can be displaced to a position capable of engaging with the pallets and a position of retracting below the pallets, the pallets each include, as engaged portions of the insertion/removal head, a first engaged portion provided to one end of the pallet in the first direction and a second engaged portion provided to another end, and the relay device inserts and removes the pallets into and from the magazine by moving the insertion/removal head in the first direction in a state where the engaging portion is engaged with the first engaged portion, and inserts and removes the pallets into and from the parts feeding table by moving the insertion/removal head in the first direction in a state where the engaging portion is engaged with the second engaged portion.