A placement device for arranging parts of a disposable worn article on the base material B, wherein: a first unit U1 includes first and third pads P1 and P3 capable of accelerating and decelerating; a second unit U2 includes second and fourth pads P2 and P4 capable of accelerating and decelerating; the first unit U1 includes separate servo motors M for rotating the first pad P1 and the third pad P3 about a common axis and does not include three or more servo motors M; and the second unit U2 includes separate servo motors M for rotating the second pad P2 and the fourth pad about a common axis and does not include three or more servo motors M.