These studies were designed to define the effects of temperature on the vegetative growth of the korean ginseng, the induction and growth of the ginseng callus and organ differentiation from the callus of ginseng. At the temperature over $25^{circ}C$. the plant growth of ginseng was significantly decreased and the chlorophyll in the .central parts of leaflets was deteriorated. Induction and growth of the ginseng callus was best at $25^{circ}C$. High temperature of $29^{circ}C$ promoted the initiation of roots from callus tissue but the shoot was not initiated at the temperature over $25^{circ}C$. Shoots initiation from the ginseng callus occurred at $21^{circ}C$ or lower temperature.