An object of the present invention is to allow an aggregate of balls with disordered mutual positional relationships to fall freely without using any moving parts, without pressing the balls from above or restricting the balls one by one, and only by rolling an inclined plate. To provide a device capable of generating one stream of balls arranged in a row. A device includes an inclined plate 1, an inclined plate 2 that forms a V-shaped valley 1 by being installed on the inclined plate, and a V-shaped valley 2 that is installed on the inclined plate 1 to form a V-shaped valley. It includes an inclined plate 3 for naturally aligning balls that roll down through or without passing through 1. [Selection drawing] Fig. 1【課題】相互の位置関係が無秩序な玉の集合体を、可動部品を用いず又玉を上から押さえつけたり玉を1個ずつ規制したりすることなく、自由落下させ、傾斜板を転がすだけで、1列に並んだ玉の流れを1つ発生させることができる装置を提供する。【解決手段】装置は、傾斜板1と、傾斜板に設置することでV字谷1を形成する傾斜板2と、傾斜板1に設置することでV字谷2を形成し、V字谷1を経由し又は経由せずに転がり下りた玉を自然に整列するための傾斜板3を含む。【選択図】図1