This study extends Hunt and Vitell’s General Theory of Marketing Ethics. Specifically, it investigates the relationship between microcultural backgrounds and perceived ethical problems through a close examination of the cultural environment of several ethnic microcultural groups in Indonesia. The ethnic microcultural groups were measured in terms of their cultural dimensions and personal value orientations. Hofstede’s Value Survey Module and Allport, Vernon, and Lindzey’s Study of Values were used to measure cultural dimensions and personal value orientations, respectively. In addition, the manager’s perceived ethical problems were assessed using four projective business scenarios. Hofstede’s Value Survey Module was factor analysed using the principal component analysis with varimax rotation procedure, which identified five cultural dimensions. These five dimensions are named as Masculinity (MAS), Individualism (IDV), Uncertainty Avoidance (UAI), and Power Distance 1 (PDI 1), and Power Distance 2 (PDI 2). The existence of two different Power Distances appear to represent the managers’ cultural convergence which is due to the use of a common business language, advanced management education, western organisational structure, and the use of modem technology. The Allport, Vernon, and Lindzey’s Study of Values includes Economic, Political, and Religious Value Orientations. Furthermore, One-way Analysis of Variance (ANOVA) and Multivariate Regression Analysis were used to examine the research hypotheses. The study results showed that the three microcultural groups in the sample differed relative to their Economic Value and Religious Value Orientations, Uncertainty Avoidance (UAI) and Power Distance 1 (PDI 1) dimensions. Another significant result showed that managers from the three microcultural groups perceived ethical problems differently. Managers perceived ethical problems were positively related to Individualism (IDV) and Uncertainty Avoidance (UAI) dimensions, and n