This study compared the contents of ginsenoside according to the extract conditions of red ginseng to provide basic information for developing functional food using red ginseng. According to the result, the content of crude saponin was highest in 72 hours of extraction at $82^{circ}C$ (RG-823). The content of prosapogenin (ginsenoside $Rh_1,;Rh_2,;Rg_2,;Rg_3$) was highest in 48 hours of extraction, and followed by 72 and 24 hours at $82^{circ}C$. And at $93^{circ}C$ the prosapogenin contents were highest in the order of 48 hours, and next in 24 and 72 hours. In addition, ginsenoside $Rb_1,;Rb_2$ Rc and Re were not detected in 72 hours of extraction at $93^{circ}C$ (RG-933) presumedly due to hydrolysis, but ginsenoside Rd, Rf and $Rg_1$ were detected as long as 72 hours of extraction. These results show that protopanaxatriol group is relatively more resistant to heat than protopanaxadiol group.