A three-dimensional image capture system for image- capturing a patient laid on a top board of a patient support table, comprising: a three-dimensional measuring device that is placed on a room-structure object (9, 69) of a room in which the patient support table is placed, and performs image-capturing of the top board and the patient without using an X-ray to thereby generate three-dimensional-image data; and a three-dimensional-image processing device wherein the three-dimensional-image processing device is configured to generate from the three-dimensional-image data, a three- dimensional image associated with a reference coordinate system which is a top-board coordinate system with reference to the top board or a room coordinate system with reference to a floor of the room in which the patient support table is placed, and that displays the three-dimensional image; wherein the three-dimensional-image processing device includes: - a position-information extraction unit configured to take a correlation between the reference coordinate system and three- dimensional position information of the patient in the three- dimensional-image data, to thereby generate reference-coordinate- system position information of the patient based on the reference coordinate system; and - a display unit configured to display the three-dimensional image in which the three-dimensional-image data and the reference- coordinate-system position information are consolidated; and wherein the display unit is configured to display two images, each being a three-dimensional image, captured at different timings and wherein the three-dimensional measuring device is movably placed on the room-structure object (6, 69). a three-dimensional measuring device that is placed on a room-structure object (9, 69) of a room in which the patient support table is placed, and performs image-capturing of the top board and the patient without using an X-ray to thereby generate three-dimensional-image data; and a three-dimensional-image processing device wherein the three-dimensional-image processing device is configured to generate from the three-dimensional-image data, a three- dimensional image associated with a reference coordinate system which is a top-board coordinate system with reference to the top board or a room coordinate system with reference to a floor of the room in which the patient support table is placed, and that displays the three-dimensional image; wherein the three-dimensional-image processing device includes: - a position-information extraction unit configured to take a correlation between the reference coordinate system and three- dimensional position information of the patient in the three- dimensional-image data, to thereby generate reference-coordinate- system position information of the patient based on the reference coordinate system; and - a display unit configured to display the three-dimensional image in which the three-dimensional-image data and the reference- coordinate-system position information are consolidated; and - a position-information extraction unit configured to take a correlation between the reference coordinate system and three- dimensional position information of the patient in the three- dimensional-image data, to thereby generate reference-coordinate- system position information of the patient based on the reference coordinate system; and - a display unit configured to display the three-dimensional image in which the three-dimensional-image data and the reference- coordinate-system position information are consolidated; and wherein the display unit is configured to display two images, each being a three-dimensional image, captured at different timings and wherein the three-dimensional measuring device is movably placed on the room-structure object (6, 69).