An accelerated particle irradiation equipment comprising: a single particle accelerator for generating accelerated particles; a single irradiation device for performing irradiation of the accelerated particles generated by the particle accelerator, wherein the irradiation device includes a rotating unit that is rotatable about a rotation axis, and an irradiation unit for irradiating an irradiation target with the accelerated particles generated by the particle accelerator and for which an irradiation direction is changed as the rotating unit is rotated, wherein said accelerated particle irradiation equipment is installed in a building having a multi-story structure, wherein the particle accelerator and said irradiation device are installed on different floors of the building, and the irradiation device is installed immediately above the particle accelerator; and wherein said accelerated particle irradiation equipment further comprises a guide line for guiding the accelerated particles generated by the particle accelerator to the irradiation device, wherein the guide line communicates with the particle accelerator, extends in a horizontal direction, is curved upward in a vertical direction, extends in the vertical direction through a communication passage between floors on which the particle accelerator and the irradiation device are installed, and is curved again in the horizontal direction, communicates with the irradiation device, wherein the guide line is disposed in its entirety on a virtual plane that extends in a vertical direction; and wherein the guide line has one end communicating with the particle accelerator and has another end communicating with the irradiation device. a single particle accelerator for generating accelerated particles; a single irradiation device for performing irradiation of the accelerated particles generated by the particle accelerator, wherein the irradiation device includes a rotating unit that is rotatable about a rotation axis, and an irradiation unit for irradiating an irradiation target with the accelerated particles generated by the particle accelerator and for which an irradiation direction is changed as the rotating unit is rotated, wherein said accelerated particle irradiation equipment is installed in a building having a multi-story structure, wherein the particle accelerator and said irradiation device are installed on different floors of the building, and the irradiation device is installed immediately above the particle accelerator; and wherein said accelerated particle irradiation equipment further comprises a guide line for guiding the accelerated particles generated by the particle accelerator to the irradiation device, wherein the guide line communicates with the particle accelerator, extends in a horizontal direction, is curved upward in a vertical direction, extends in the vertical direction through a communication passage between floors on which the particle accelerator and the irradiation device are installed, and is curved again in the horizontal direction, communicates with the irradiation device, wherein the guide line is disposed in its entirety on a virtual plane that extends in a vertical direction; and wherein the guide line has one end communicating with the particle accelerator and has another end communicating with the irradiation device.