PROBLEM TO BE SOLVED: To provide a technique capable of easily advancing work using a potter's wheel even if the person is not a skilled potter. SOLUTION: A potter's wheel unit U1 includes a potter's wheel 1 having a top plate 11 rotatably provided around a rotation shaft A, and an attachment member 2 detachable from the top plate 11. The attachment member 2 is a flat surface that fixes the attachment member 2 so as not to rotate with respect to the top plate 11 by abutting the inner peripheral surface with the side surface of the top plate 11 in the mounted state in which the attachment member 2 is attached to the top plate 11. An annular fixing portion 22 and a step forming portion 21 that forms a planar viewing circular positioning step T concentric with the rotation axis A in the mounted state are provided. [Selection diagram] Fig. 1
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