PROBLEM TO BE SOLVED: To provide radiation therapy equipment capable of easily recognizing whether or not a posture of a patient and a position of a treatment table in radiation therapy are appropriate.SOLUTION: A display part 17 is caused to display DRR images 101 and 102 created based on a three-dimensional CT image, X-ray images 103 and 104, and an image 107 indicating a posture of a patient and a position of a treatment table necessary for performing treatment according to a treatment plan. The display part 17 is caused to also display an information display area 105 for indicating various kinds of information including data of the patient, etc., and an image 106 of a treatment room taken by a camera that photographs the treatment room.