Korean agriculture has experienced rapid growth during past 50 years. Korean agriculture grew by a so-called Bio-Chemical technology until late 1970s, and then Mechanical technology led to agricultural growth from 1980s. Such kind of technological progress in the Korean agriculture is confirming induced technical change (or input biased technical change) by Hayami and Ruttan. But, agricultural growth in Korea is led by output biased technical change (or products mix) than input substitution since 1990s. Conclusively, the sustainable growth of Korean agriculture in the future has to depend on flexibility of output biased technical change.