In the present study, egg development and early life history of Korean spined loach, Iksookimia koreensis, were observed. Adult fish were sampled using spoon nets in Okgye-ri, Hoengseong-gun, Gangwon-do, Korea in July 2010. Eggs were obtained after injecting females with Ovarprim. Eggs were then artificially fertilized in the laboratory using the dry method. Mature eggs were slightly adhesive and transparent with a light yellowish color, and measured 1.40±0.04mm(mean±SD) in diameter. Hatching of the embryo occurred approximately 50 h after fertilization in the water at 23℃, and newly hatched larvae were averaged 4.7±0.21 mm in total length. 5 days after hatching, the averaged total length of larvae was 7.1±0.25 mm and their yolk sacs had been completely absorbed. 17 days after hatching, fish started to enter the juvenile stage and reached 12.2±1.10 mm in total length. 80 days after hatching, the band patterns and external form of juvenile fish were similar to those of adults, and they averaged 31.0±3.98 mm in total length.