This study develops a novel eddy current testing probe that can considerably reduce a drawback caused by the skin effect, on the basis of the new excitation system proposed by the authors. The key idea of the new excitation system is the suppression of eddy current density on the surface of a specimen using superpositioned phase-shifted excitation fields. The probe consists of four coaxial rectangular exciters; the phase and the density of exciting currents in the exciters are adjusted so that density of induced eddy currents on the surface is suppressed, whereas that at the depths of the specimen remains as unchanged as possible. Experimental verifications and numerical simulations are performed to evaluate the efficiency of the new probe. The results show that the new probe indeed realizes deep penetration of induced eddy currents, and provides 20% difference between signals due to 15 mm deep near-side notch and those due to 20 mm deep one although an exciting frequency of 10 kHz is applied.