An X-ray diagnosis apparatus comprising: an image-data creating unit adapted to create original X-ray images along a time sequence by detecting X-rays radiated from an X-ray tube and passed through a subject, wherein the original X-ray images include a reference image; a feature point detecting unit adapted to detect a position of a feature point included in a certain object, which is a treatment instrument, on a new original X-ray image created by the image-data creating unit each time when the image-data creating unit creates, after the reference image is created, said new original X-ray image as a new one of said original X-ray images along said time sequence such that a reference position of the feature point is detected for the reference image and a new target position of the feature point is detected for the new original X-ray image; a correction-image creating unit adapted to create a correction image from the newly created original X-ray image through a correction process, the correction process including at least one of image shift and image transformation, by matching up the new target position with the reference position; and a display control unit adapted to perform control of displaying the newly created correction image onto a certain display unit each time when the correction-image creating unit newly creates the correction image, wherein the detecting of the position of the feature point, the correction process and the displaying of the newly created correction image are repeated for new images being created by the image-data creating unit so as to sequentially and instantly display newly created correction images as a moving image in which the certain object is stationary onto the certain display unit along said time sequence, wherein the display control unit is further adapted to perform one of: control of displaying the new original X-ray image along with the correction image in parallel onto the certain display unit, and control of displaying the original X-ray image onto a different display unit from the certain display unit, and wherein, when the feature point detecting unit does not extract the feature point from the new original X-ray image, the display control unit is adapted to control the correction-image creating unit so as to suspend processing of creating a correction image from a new original X-ray image, to perform control of displaying continuously onto the certain display unit a correction image for display that is based on an original X-ray image created immediately before the new original X-ray image from which the feature point detection unit does not extract the feature point, and to perform control of displaying the new original X-ray image as a moving image continuously. an image-data creating unit adapted to create original X-ray images along a time sequence by detecting X-rays radiated from an X-ray tube and passed through a subject, wherein the original X-ray images include a reference image; a feature point detecting unit adapted to detect a position of a feature point included in a certain object, which is a treatment instrument, on a new original X-ray image created by the image-data creating unit each time when the image-data creating unit creates, after the reference image is created, said new original X-ray image as a new one of said original X-ray images along said time sequence such that a reference position of the feature point is detected for the reference image and a new target position of the feature point is detected for the new original X-ray image; a correction-image creating unit adapted to create a correction image from the newly created original X-ray image through a correction process, the correction process including at least one of image shift and image transformation, by matching up the new target position with the reference position; and a display control unit adapted to perform control of displaying the newly created correction image onto a certain display unit each time when the correction-image creating unit newly creates the correction image, wherein the detecting of the position of the feature point, the correction process and the displaying of the newly created correction image are repeated for new images being created by the image-data creating unit so as to sequentially and instantly display newly created correction images as a moving image in which the certain object is stationary onto the certain display unit along said time sequence, wherein the display control unit is further adapted to perform one of: control of displaying the new original X-ray image along with the correction image in parallel onto the certain display unit, and control of displaying the original X-ray image onto a different display unit from the certain display unit, and wherein, when the feature point detecting unit does not extract the feature point from the new original X-ray image, the display control unit is adapted to control the correction-image creating unit so as to suspend processing of creating a correction image from a new original X-ray image, to perform control of displaying continuously onto the certain display unit a correction image for display that is based on an original X-ray image created immediately before the new original X-ray image from which the feature point detection unit does not extract the feature point, and to perform control of displaying the new original X-ray image as a moving image continuously.