An MRI apparatus includes a flexible upper RF coil unit having a plurality of coils which irradiate RF pulses or detect MR signals to or from an object, and a supporting unit configured to rotatably hold the RF coil unit at an upper end portion of the supporting unit, the coil unit supporting unit having a prescribed height so that the RF coil unit is placed at a position closely apart from the object. A lower portion of the supporting unit can be inserted in a guiding groove provided on an edge portion of the top plate. An upper portion of the supporting unit includes a rotatable joint member configured to rotatably hold one edge of the upper RF coil unit and a supporting arm extended from the rotatable joint member so as to support a lower surface of an edge portion of the upper RF coil.