<;P>;PROBLEM TO BE SOLVED: To provide an MRI apparatus which can save labor for piping of a cooling tube. <;P>;SOLUTION: The MRI apparatus includes a top plate 71 on which a subject P is placed, a rail 73 arranged so as to pass through an opening 11 provided on a rack 10 for introducing the top plate 71 into the opening 11, a frame 74 inside of which the rail 73 is supported and a channel is formed, and a cooling part 80 to cool the rack 10. The cooling part 80 discharges air, which rises in temperature on the rack 10, through the frame 74 and the cooling tube arranged on outside of the rack 10 connected to the frame 74. <;P>;COPYRIGHT: (C)2011,JPO&INPIT