The present invention is able to provide an easily usable user-interface for the user no matter he/she is right-handed or left-handed. The medical apparatus provided by the present invention comprises a casing, a display section formed on the casing, and a manipulation section formed on the casing. The contents of the display displayed by the display section can be turned only a designated angle under the predetermined condition. The medical apparatus makes the manipulation section to exchange the assigned function of each of the manipulation elements when the contents of the display are turned.本發明係提供一種與不受使用者之較靈活的手所影響而容易使用的使用者介面。醫療用裝置具有箱體，設於箱體具有標示部，及操作部。標示部所標示的標示內容，於所定條件下只能夠回轉所定角度。於是醫療用裝置於回轉標示部的標示內容時，可將操作部的各操作零件所分擔之功能予以調換。
