The present invention is purported to provide an electromagnet support frame for supporting a large-size electromagnet, which is highly flexible in arrangement of the large-size electromagnet and can be made compact as an entire apparatus. The electromagnet support frame is for supporting an electromagnet (30) having a trunnion pair (33) which comprises two trunnions (32) that are formed on mutually opposite side-faces of the electromagnet and whose central axes (34) are matched to each other, and is characterized by including support fixtures (10) whose number is the same as that of the trunnions (32) and in which engaging parts (19) are formed that are engaged with the trunnions (32) so as to cover outer faces thereof, and a mounting frame (26) that holds the support fixtures (10) through vertical adjustment parts (21) that move the fixtures in a vertical direction.
