To provide a device where the input operation of medical treatment information is easy and where an input screen which a doctor can display by a format that he is used to see at the time of input is obtained by displaying medical treatment information on a medical treatment information input screen in a display mode decided by the medical treatment information name when medical treatment information is decided/inputted from an input column.

When a medical treatment information name is selected in a medical treatment information input screen, an input column of the medical treatment information name is set in the medical treatment information input screen. When medical treatment information is decided/inputted from the input column which has been set, medical treatment information is displayed on the medical treatment information input screen at a display mode decided by the medical treatment information name. In the device, definition information of medical treatment information is stored in the medical treatment information definition master file 31 of a recording device 30 for every medical treatment information. The content of medical treatment information inputted at the time of every medical examination is stored in a medical treatment information registration file 32. A clinical record display format regulating a display system on a clinical record screen is stored in a clinical record display format master file 33 in accordance with a medical treatment information code.