The present invention provides an electromagnet rack, which is disposed in an apparatus chamber with an electromagnet and is capable to diminish a distribution space of power cables of the electromagnet. The electromagnet rack (1) comprise: a ceiling plate (11) supporting the electromagnet (2a)； a plurality of legs (13) supporting the ceiling plate (11)； and a cable distribution element (12) fixed at the plurality of legs (13) and disposed under the ceiling plate (11). A cable distribution portion (16), where the power cables (4) of the electromagnet (2a) is disposed and extended along a moving direction of charged particle beams (51), is formed between the cable distribution element (12) and the ceiling plate (11). A cable distribution wideness (a length between the legs in a wideness direction (L1)), which is the length of the direction perpendicular to the moving direction of the charged particle beams (51), is greater than a wideness (Mw) of the direction perpendicular to the moving direction of the charged particle beams (51) of the electromagnet (2a).本發明之目的係提供一種電磁鐵支架，係在配置有電磁鐵的設備室當中，能減少電磁鐵之電源電纜配置空間。電磁鐵支架(1)之特徵在於具備：頂板(11)，係支持電磁鐵(2a)；複數個腳(13)，係支持頂板(11)；以及電纜配置構件(12)，係固定於複數個腳(13)，並且配置於頂板(11)的下側；其中，用以將電磁鐵(2a)的電源電纜(4)沿著荷電粒子射束(51)的行進方向延伸而配置之電纜配置部(16)係形成於電纜配置構件(12)和頂板(11)之間，電纜配置部(16)之與荷電粒子射束(51)的行進方向垂直的方向的長度之電纜配置寬度(寬度方向腳間長度(L1))，係較電磁鐵(2a)之與荷電粒子射束(51)的行進方向垂直的方向的寬度(Mw)為更長。
