This study examined relationships between national cultures and presidential candidates' leadership styles in Korea by applying the competing values model. Specifically, This study researched respondents' attitudes toward national cultures and presidential candidates' leadership styles by demographic characteristics. First of all, they believe that Korea is a human relations organization which are flexible and internal constituents oriented. Regarding overall evaluation toward presidential candidates, Park ranked first and Moon, Son, and Oh ranked accordingly. They considered Park as an innovator or broker, Moon as a director/producer or facilitator/mentor, Son and Oh as a director/producer. Additionally, aged respondents for the ruling party had positive attitudes toward national cultures and presidential candidates' leadership styles. There are co-related between opinion which Park has supportive leadership and opinion which Korea is development oriented culture society. Detailed interpretation has been discussed.