To accurately evaluate interference between a radiation therapy apparatus, a bed, and a patient without having to make efforts.SOLUTION: A radiation therapy support apparatus according to the embodiment includes: a risk value calculation unit for calculating a risk value which quantitatively determines a risk of inter-element interference between the radiation therapy support apparatus and a patient on the basis of a treatment plan of radiation therapy on the patient； a visual information generation unit for generating, based on the risk value, visual information in which the risk of the inter-element interference is made visually discernible； and a display unit for displaying the visual information.SELECTED DRAWING: Figure 2【課題】放射線治療装置、寝台及び患者間の干渉を手間無く正確に評価すること。【解決手段】実施形態に係る放射線治療支援装置は、患者に関する放射線治療の治療計画に基づいて、前記患者及び放射線治療装置の要素間の干渉の危険度を定量するリスク値を算出するリスク値算出部と、前記リスク値に基づいて前記要素間の干渉の危険度を視認可能な視覚情報を生成する視覚情報生成部と、前記視覚情報を表示する表示部と、を具備する。【選択図】 図２
