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Despite having concentrated in specific major and given an internship experience, vocational high-school students are still felt uncertain and confused when it comes to make career decisions. This phenomenon is related to the career decision self-efficacy (CDSE). CDSE is a significant factor in influencing one's career decision making process and can be influenced by various factors, two of which are emotional intelligence (EI) and proactive personality (PP). This study examined the effect of EI and PP on CDSE vocational students. Participants in this study were 866 12^th grade students from 9 vocational high schools in Jakarta and Depok. The measurements used are Career Decision Self-Efficacy Scale Short-Form, Trait Emotional Intelligence Questionnaire, and Proactive Personality Scale. The multiple regression analysis results showed that the EI and PP significantly influence CDSE, in which PP had a greater influence than EI. This study contributes to add knowledge in educational psychology field and can become basis for career development programs, especially in improving CDSE. However, this study has several limitations. First, the use of self-repot method can limit the accuracy responses. Second, this research only focuses on internal factors (EI and PP) and does not examine external factors which can also contribute to CDSE.