Aim: This research determined the relationship between university teachers’ professional identity and their work performance. -/- Methodology: The design that was used in this study is a Descriptive Comparative- Correlational research design using the quantitative approach. Participants in this study were taken from the 967 university teachers at Guangdong Business and Technology University from the 14 colleges. They were chosen randomly. The researcher used the Qualtrics calculator at a 5% margin of error to arrive at 275 respondents. Data analyses include (...) frequency count and percentage, weighted mean, and descriptive equivalent. A five-point scale was used in this study as a guide to answer the questionnaire. -/- Results: Based on the result, the highest manifestation of teachers’ professional identity was found to be on their professional behavior tendency which was ranked first among the four indicators. It was followed by professional values and professional belonging, while role values tend to be the least manifested professional identity based on the self -assessment of the teachers. The over-all mean value of 3.52 reveals that professional identity was highly manifested among the teachers of Guangdong Business and Technology University. Teacher respondents have manifested an outstanding work performance particularly on work attitude as this was given the highest rating by the teachers themselves. Second in rank was the interpersonal promotion, followed by completion of teaching activities which also shows an outstanding work performance. On the other hand, teachers’ work performance on student achievement was given the lowest assessment by the teachers showing a very satisfactory performance. Generally, the result reveals that teachers exhibited an outstanding work performance as perceived by themselves. Based on the result, there were no significant differences in the assessment of teacher respondents when they are grouped according to gender. This is taken to mean that male and female teachers have relatively the same assessment as regards their work performance in terms of work attitude, interpersonal promotion, completion of teaching activities, and student achievement. Generally, the result reveals that there was a significant relationship between the teachers’ professional identity and their work performance. The result reveals that professional identity of teachers has positive impact on their work performance. -/- Conclusion: Respondents are dominated by female teachers who are mostly in their middle age. A good number of teachers who have earned master’s and doctoral degrees are also evident. They perceived themselves to have a high level of professional identity specifically on professional behavior tendency, professional values, and professional belonging. Teachers have relatively the same assessments on their professional identity regardless of their gender, age, educational attainment, and monthly income. They exhibit an outstanding work performance particularly on work attitude, interpersonal promotion, and completion of teaching activities. However, they feel that they had less contribution to student achievement. Teachers have relatively the same assessments on their work performance regardless of their gender, age, educational attainment, and monthly income. Professional identity of teachers can somehow influence their work performance in general. Specifically, professional values and professional belonging give positive effect to work attitude of teachers, and to their completion of teaching activities. (shrink)