This article aims at exploring whether project based content language integrated learning (CLIL) has a significant effect on the oral capability of students of science department of the University of Lampung. The number of students involved in this study was 88 students. Quantitative data was obtained from the value of students' English proficiency before and after CLIL model application. While the qualitative data was obtained from the output of language produced by students during the learning process took place. The results showed that project based CLIL English language course in Mathematics study program the faculty of teaching and education, the University of Lampung could work effectively. This is evident from the implementation of the whole program activities, from the implementation of the formation of groups, students work in groups to finish the project, group presentation activities, personal presentations and students' responses to all activities.