Since its introduction to Korea from Japan at the beginning of the seventeenth century tobacco became very popular with an amazing rapidity among Koreans Along with widespread cultivation of tobacco smoking also became very popular among Koreans regardless of their classes ages and sexes On the other hand other imported crops from America via Europe in the same period like sweet potato potato corn and tomato did not enjoy such popularity in Korea A long time after their introduction Koreans began to cultivate these crops Why did Koreans responded enthusiastically to the newly-imported tobacco? What kind of factors contributed to the rapid transmission of tobacco in Korea? This study examined the causes of rapid diffusion of the smoking population in three aspects First was economic aspect The farming of tobacco yielded a profit by selling it to Chinese The climate and the soil of Korea fit for farming of tobacco So the farm land of tobacco expanded gradually since 18th century Second was medical aspect At first many Koreans believed that smoking was helpful to digestion expectoration protecting coldness and exterminating parasites Afterwards they believed smoking could encourage vitality and protect diseases There was no reason of smoking cessation for the people's health in that the hazards of smoking were not well known to the commonage in those days though a few intellectuals acknowledge its harm Third was sociocultural aspect We could trace the smoking culture of Chosun dynasty through arts poems and essays The making of smoking culture made stable reproduction of smokers generation by generation Especially the smoking culture secured juvenile's smoking Considering three aspects above we knows that what reason the Decree of Ban of Smoking(禁烟令) in Korea was not strict in comparison to that of China(Qing Dynasty) in which the violators were executed The regulation of smoking by the government failed except controlling in sociocultural aspect The government reinforced controlling of smoking culture in counteraction to the threat of collapse of the hierarchy of Chosun dynasty in 18th century.