This research was aimed at investigating effectiveness of project-based learning toward students' achievement. Two groups of student majoring in accounting were involved in the research. The groups of students who had same English level of ability according to their English lecturer were given a three-session English learning with project-based learning (PjBL) approach. The experiment group was given PjBL model and the control group was given conventional learning model. Upon learning, students of both groups were assigned to make a dialog with members of their group. Their performance in front of class was assessed by using assessment rubric developed in prior. In addition, they were assigned to make written complaint. Assessment result of both group were then analyzed to see difference of both group competence, how much percent was the increase.