To provide "a camera parameter acquisition device" capable of improving precision of camera parameters to be acquired.

First data indicative of design values / reference values of internal parameters of a camera to be corrected and second data indicative of design values / reference values of a relative posture for a correction pattern of the camera are prepared, and a control means generates and displays the correction pattern on a display device, corrects the position of an expected correction control point, generated to have a nearly expected distribution on an image, using the first and second data so that the difference between the expected correction control point and a correction control point extracted from a result of imaging of the correction pattern on the display device by the camera is within a permissible range, and regenerates and displays a correction pattern corresponding to the result of the correction on the display device.

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