A particle beam treatment apparatus includes: a gantry configured to axially rotate in a state where an irradiation port for a beam is fixed to a body of the rotating gantry； a moving floor that is provided inside the gantry, is configured by annually connecting a plurality of plates with each other in a freely bendable manner, accommodates at least a part of a bed fixed from a stationary system, and rotates together with the gantry in a state of causing the irradiation port to penetrate the moving floor； a cable configured to be connected to a device fixed to the moving floor and be wired to outside of the gantry in a state of passing through the gantry； and an adjuster configured to adjust length of the cable wired inside the gantry when the gantry axially rotates.[課題]藉由在與設在移動地板的機器相連接的纜線的配線下工夫，以提供旋轉動作的安定性優異的粒子線醫療裝置。[解決手段]粒子線醫療裝置(10)係具備有：旋轉機架(15)，其係在使射束(19)的照射口(18)固定在機體的狀態下進行軸旋轉；移動地板(12)，其係被設在該旋轉機架(15)的內側，將複數板材(11)相互彎曲自如地作環狀結合而成，收容由靜止系統被固定的床(24)的至少一部分，在貫穿照射口(18)的狀態下，連同旋轉機架(15)一起進行周旋轉；纜線(31)，其係與被固定在該移動地板(12)的機器(25)相連接，且貫穿旋轉機架(15)而被配線在其外側；及調節部(30)，其係進行軸旋轉時，調整被配線在旋轉機架(15)的內側的纜線(31)的長度。
