An RF coil includes: a first loop coil element including a first plane closed by a first coil line; and a second loop coil element including a second plane closed by a second coil line, in which part of said first plane and part of said second plane face each other, wherein: said first loop coil element and said second loop coil element so move while maintaining the facing state as to vary the square measure of the facing area in which said first coil plane and said second coil plane face each other; said first loop coil element includes: a first spreading part having a first coil line so disposed that the distance of opposing by said first coil line parallel to a first moving direction, widens in said first moving direction, in a direction normal to said first moving direction in which the movement so takes place that the square measure of said facing area increases relative to said second loop coil element in a direction parallel to said first plane; and a first coil crossing part in which a first coil line is so disposed as to cross a second spreading part, in an arrangement in which said first loop coil element and said second loop coil element are electromagnetically decoupled and the square measure of said facing area is at the minimum thereof; said second loop coil element includes: a second spreading part having a second coil line so disposed that the distance of opposing by said second coil line parallel to a second moving direction, widens in said second moving direction, in a direction normal to said second moving direction in which the movement so takes place that the square measure of said facing area increases relative to said first loop coil element in a direction parallel to said second plane.