Open AccessWith an increasing pressure of environmental deterioration, many firms have started to be socially responsible by developing green products to meet the demand of environmentally conscious consumers. These firms are interested in finding the determinants of green purchase behaviour in order to develop effective communication messages and derive green purchase commitments. The effects of environmental knowledge, environmental threat and perceived consumer effectiveness (PCE) in motivating one’s behavioural change to engage in pro-environmental behaviour have been tested in the past, but they have not been tested together in the context of green purchase behaviour in Malaysia. Therefore, this paper reviews the conceptual and empirical literatures of the aforementioned variables in explaining the environmental attitude and behaviour, and proposes a conceptual model to be considered for future green purchase behavioural studies. The finding is expected to provide guidance for firms to profile the green buyers and position its green product more effectively.