The study aims to conduct a conceptual review of ethical investment research based on Widyawati (2019). Through the conceptual review method, the research obtained 70 relevant articles. The results of the literature analysis conclude that there is a development of ethical investment studies and in general it is divided into four main themes, namely (i) investor behavior studies, (ii) ethical investment development studies, (iii) ethical investment performance studies and (iv) ethics and religious-based investment studies (stock of sin stocks category). The studies of investor behavior focuses on examining the characteristics of ethical investors such as motivation, investment patterns and the basis for making investment decisions. The studies of ethical investment development emphasizes the description of ethical investment in a particular area, the argumentation of ethical investment theory and the role of participants in the ethical investment market, including ethical investment mechanisms, namely screening and shareholder activism. The studies of ethical investment performance focus on the performance by comparing the return on ethical investment with its benchmark (nonethical investment). Meanwhile the studies of ethical and religious-based investment (stock of sin stocks category) focuses on testing implementation of negative screening of sin stocks, testing the performance of sin stocks and testing the relationship between sin stocks with certain themes.