Succinic acid (SA) was produced from Actinobacillus succinogenes with high cell density by continuous fermentation using fibrous bed bioreactor (FBB). The effects of feeding glucose concentration, dilution rate, and pH on continuous production of SA were examined to achieve an efficient and economical bioprocess. The optimum feeding glucose concentration, dilution rate, and pH were 80 g/L, 0.05 1/h, and6.0–6.5, respectively. A SA concentration of 55.3 ± 0.8 g/L, productivity of 2.77 ± 0.04 g/L/h, and yield of0.8 ± 0.02 g/g were obtained, and the continuous fermentation exhibited long-term stability for as long as18 days (440 h) with no obvious fluctuations in both SA and biomass levels. The Jerusalimsky equation forthe specific rate of SA production presented the inhibition phenomenon of the product, demonstratingthat 60 g/L SA might be a critical concentration in this continuous FBB system. The results obtained couldbe beneficial for future fermentor designs and improvements in SA production.