With the recent successes with the PPP model in the UK, Hong Kong, Singapore, Australia and other countries, PPP has become increasingly common in Malaysia. This paper focuses on the results obtained from a recent survey of PPP projects in Malaysia concerning the factors that are considered critical to the success of PPP project implementation. In particular, there are three objectives of this present study. First, it aims to examine the importance of the success factors as perceived by the overall respondents. Second, the study intends to identify the differences in perception concerning the importance of the success factors between the public and private sectors.