This paper compared the teamwork competency of university students when graduating. Participants and non-participants in a skills training conducted at university to develop teamwork competency (Tabata, 2016) took part in this study. They completed self-report scales assessing general social skills, teamwork competency, communication, team orientation, back-up, monitoring, and leadership, 20 months after completing the training. Results indicated that compared to non-participants, participants in the skills training possessed higher social skills scores and many sub-elements of teamwork competency when graduating.