H2S generation suppression by the addition of NO3 from reagent (NR) or compost (NC), and O2 supply (OX) was quantitatively estimated in column percolation experiments. The cumulative amounts of oxygen added exceeded 300 mmol-O/L in NR and NC, and approximately 2 mmol-O/L in OX on day 75. The cumulative amounts of H2S generated on day 60 in control, NR, NC, and OX were 69, 26, 71, and 31 mmol-H2S/L, respectively. The amounts in NR and OX were half of that in control, whereas the amount in NC was almost the same as that in control. The H2S generation rates from day 50 to day 60 in control, NR, NC, and OX were 0.86, 0.019, 0.75, and 0.041 mmol-H2S/(L•d), respectively, and the rates in NR, NC, and OX were 0.02, 0.9, and 0.05 times that in control. In this way, the H2S generation suppression effects of NO3 reagent addition were observed. In NR, although NO3 was injected from the top of the column, the suppression effect reached the deep layer.