To expand an imaging space by expanding a region where an RF magnetic field is uniformly irradiated, and acquire an MRI image of a wide range and high image quality without increasing the number of components or device cost.SOLUTION: A high-frequency coil unit includes a cylindrical RF coil 210 applied to an MRI device for executing at least one of transmission of a high-frequency signal to a static magnetic field space, and reception of a nuclear magnetic-resonance signal generated from a subject placed in a static magnetic field, and a shield composed of a sheet-like conductor, which is cylindrically shaped so as to surround the RF coil. The RF coil includes two ring conductors 203 formed annularly and disposed at both ends of the cylindrical shape, a plurality of rung conductors 214 disposed in parallel with a central axis of the cylindrical shape along the cylindrical outer peripheral surface, which have N (N is an integer of 2 or more) linear parts arranged roughly in parallel with each other in a circumferential direction, and connect the two ring conductors, and a plurality of capacitors inserted between the adjacent rung conductors in the ring conductors.SELECTED DRAWING: Figure 2
展开▼
