Construction industry plays an important role in the Malaysia economy. One of the factors that contribute to this industry is infrastructure projects. Rework in infrastructure projects can cause the collapse of the Malaysian economy since it is detrimental to project outcomes. However, less attention was given regarding rework within the Malaysian construction industry especially in infrastructure projects. The purpose of this paper is to investigate the rework causes in the infrastructure project at Pulau Pinang. To acquire opinion of professionals from the construction industry about rework causes in infrastructure projects, questionnaires were distributed via Google form and received 52 responses. Data was analysed through SPSS 25.0 and ranked according to the level of importance. From this research, the results revealed that subcontractor factors and design related factors are the major categories that contribute to rework causes. In addition, the study showed that communication effectiveness within owners and changes made at request of the client are the main rework causes which considerably influenced infrastructure projects performance.