Abstract: In a three-dimensional video image projecting device and projecting method for projecting on a screen, by means of video image projectors, a three-dimensional video image which can be three-dimensionally viewed through three-dimensional glasses having a first polarizing filter and a second polarizing filter arranged thereon, the screen is obtained as a cylindrical body, with an inner circumferential face being a screen face, a plurality of video image projectors are disposed to be opposed to the screen face, and the video image projectors produce a continuous, three-dimensional video image in a circumferential direction, by projecting, from the video image projectors, three-dimensional video images, each of which has an angle of 30 degrees in a circumferential direction of the screen face, arranged horizontally along the circumferential direction of the screen face.