Objective : The content of essential oils from Ssajuari and Sajabalssuk was analyzed based on storage period. A total of eight samples old Ssajuari (harvested in 2000, 2001, 2002, 2003, and 2004), fresh Ssajuari (harvested in 2004), old Sajabalssuk (harvested in 2002), and fresh Sajabalssuk (harvested in 2004) was analyzed. Methods : The analysis of the content of essential oils from Ssajuari and Sajabalssuk was conducted by GC/MS. Results : The main essential oils of Ssajuari were ${eta}$-thujone and 1.8-cineole. The ${alpha},{eta}$-thujone and 1,8-cineole were increased but the caryophyllene oxide was decreased. in accordance with storage period. The main essential oils of fresh Sajabalssuk were trans-${eta}$-caryophyllene, terpinen-4-ol. The main essential oils of old Sajabalssuk was ${eta}$-thujone and 1,8-cineole like Ssajuari. But 1,8-cineole was higher than that of Ssajuari samlpes. Conclusion : All samples had trans-sabinene hydrate, 1,8-cineole, terpinen-4-ol and caryophyllene oxide. According to stored year, ${eta}$-thujone, ${alpha}$-thujone were increased but terpinen-4-ol, caryophyllene oxide were decreased.