Introduction: Peer mentoring is one of the mentoring essential components in any higher institution of learning. In the Medical Faculty of Universiti Malaysia Sarawak (UNIMAS), this mentoring system has existed long but has not undergone any formal evaluation. Objective: The main objective of this study is to determine the perception of peer mentoring among medical students of Faculty of Medicine and Health Sciences (FMHS), UNIMAS. Method: It was a cross-sectional study using self-administered questionnaire. All medical undergraduate students of FMHS were recruited. Data was analyzed using SPSS version 22. Result: A total of 234 respondents participated in this study. Peer mentoring system was preferred against other mentoring system. Majority of the respondents reported that academic gain was the main benefits they gained from peer mentoring system. Negative attitude of the mentee and poor time management for the meeting were the top two worst experience encountered by both mentors and mentees respectively. More than half of the mentor and mentee perceived that peer mentoring system was beneficial to them compared to other systems, with reason that the interaction between student themselves were more easier and comfortable. Nevertheless, there should be more interaction between the mentors and mentees. Conclusion: The findings indicated there is a positive contribution of peer mentoring towards the mentoring system of the faculty. There is a need to relook at the current mentoring system and consider peer mentoring to improve the student support.