The medical device data analysis device (57, 22) of the present invention are used for analyzing plural kinds of data of plural medical devices which have been obtained during an operation, and includes a data input portion for inputting the plural kinds of data outputted from the plural medical devices respectively, a data storage portion for storing the plural kinds of data outputted from the medical devices and inputted through the data input portion, and a display processing portion for processing the plural kinds of data stored in the data storage portion so as to be displayed, wherein the display processing portion executes a graph display processing for allowing display of the plural kinds of data stored in the data storage portion in a graph with a same time axis.
