Internal locus of control is one of the factors related to vocational high school students' entrepreneurial intention. This study aimed to empirically test the relationship between internal locus of control and entrepreneurial intention on vocational high school students. The population in this study was all students of class XII at Vocational High School 5 Yogyakarta as many as 392 students and research participants in total was 171 students. The sampling technique used was cluster random sampling. Data collection was conducted by using the scale of entrepreneurial intention and internal locus of control scale. Data analysis was done using product moment analysis technique. The results of data analysis showed a significant positive relationship between internal locus of control with entrepreneurial intention, with a significance level (p) of 0.030. Internal locus of control contributed 2.1 percent to entrepreneurial intention so that the remaining 97.9 percent was influenced by other variables. It could be concluded from this study that students' internal locus of control can predict student's entrepreneurship intention.