A main display region 41 in which medical care data on a plurality of items is displayed is provided on the display screen 15. The main display region 41 may be displayed in two display modes of a two-dimensional display mode and a three-dimensional display mode in which a two-dimensional plane on which time series data is displayed is three-dimensionally displayed using the laws of perspective. In the three-dimensional display mode, a summary window for displaying a summary of data content of the plurality of pieces of time series data at an arbitrary point in time designated on a time axis.
