A split resonator and a printed circuit board (PCB) including the same are disclosed. The split resonator is mounted to one side of the PCB to improve the electromagnetic shielding effect, and absorbs a radiation field emitted to the outer wall of the PCB. The PCB includes: a substrate on which one or more electronic components are populated; a dielectric substrate mounted to one side of the substrate; one pair of conductors provided in the dielectric substrate, spaced apart from the substrate in a thickness direction of the substrate by a predetermined distance, and arranged to face each other; and a connection portion configured to interconnect the one pair of conductors, and arranged in parallel to the thickness direction of the substrate.