PROBLEM TO BE SOLVED: To provide a window display device capable of securing excellent operability when performing work by sequentially displaying display windows selected among a plurality of display windows.SOLUTION: A window display device includes: reception means which receives selection of display windows on the basis of a user's operation; selected window display means which displays the display windows being selected by the reception means on a screen; and history display means which simultaneously displays a history display window in which a history of the selected display windows is shown in such a form as the user can see an order the display windows have been selected first, along with the display windows displayed by the selected window display means, on the screen.
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