A rack (500) that supports medical devices (1, 1001) includes mounting sections (C1-C3). Each of the mounting sections (C1-C3) includes an upper post (535A) and a lower post (535B). The medical devices (1, 1001) includes a first hole (611) and a second hole (612). When the upper post (535A) is fitted into the first hole (611) and the lower post (535B) is fitted in to the second hole (612), the medical device (1, 1001) can be rotated around a shaft (CL) passing through the posts (535A, 535B) and the holes (611, 612). An outlet terminals (530) of the mounting section (C1-C3) can be surely and smoothly fitted into outlet terminal hole (570) of the medical device (1, 1001) by rotating the medical device (1, 1001) around the shaft (CL).
