In order to allow the capacitances of a plurality of resonance capacitor elements inserted in a ring-shaped conductor element of a birdcage-type high-frequency coil to be collectively adjusted in a balanced manner without the need to perform adjustment separately, there is provided a birdcage-type high-frequency coil including two ring-shaped conductor elements in which a plurality of resonance capacitor elements are inserted in series and a plurality of linear conductor elements electrically connected to the two ring-shaped conductor elements. An adjustment belt to change the apparent capacitances of the plurality of resonance capacitor elements collectively is slidably disposed on the outer periphery of at least one of the two ring-shaped conductor elements with a dielectric member interposed therebetween.