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In two complementary measurements, a cubelike array of six Euroball-Cluster germanium detectors and a total-absorption ␥ spectrometer were used to investigate the ␤ decay of 98 Ag, a three-proton-hole and oneneutron-particle nucleus with respect to the 100 Sn core. The half-life and Q EC value of the decay were determined to be 47.7͑0.3͒ s and 8200͑70͒ MeV, respectively. A total of 438 ␥ rays ͑414 new͒ was observed, and 173 levels ͑163 new͒ in 98 Pd have been identified. The Gamow-Teller ͑GT͒ ␤-decay strength distribution from the total-absorption ␥ spectroscopy reveals a large GT resonance around 6 MeV with a width of about 2 MeV. The hindrance factor for the total GT strength, summed from the ground state up to 7.8 MeV excitation energy in 98 Pd, amounts to 4.6͑6͒ with reference to a shell-model calculation which yields good agreement with the shape of the experimental GT resonance.