Spiral wires were packed into a bubble column to increase the gas-liquid interfacial area and the effect of packing was investigated by measuring the changes in the gas hold-up and the gas-liquid interfacial area. The optimum size of spiral wire turned out to be 6 ㎜ in diameter with the ratio of pitch to diameter of two. Under the optimum conditions, the interfacial area for the packed bubble column became four times as large as that for the column without spiral wires.