This study investigates how Islamic religiosity affects ethical decision making. The study was conducted in the Malaysian workforce across the public and private sectors with a sample of N = 160. Five factors are tested to determine if they mediate the relationship between Islamic religiosity and ethical intention. These factors are: perceived importance of the ethical issue, moral judgment, ego strength, spiritual intention, and conscience. A parallel mediation design was chosen to test six hypotheses derived from the theoretical literature. The (...) findings indicate that only the variable conscience mediates the relationship between religiosity and ethical intention. This study gives insights into the role of Islam in ethical decision-making, especially for Muslims in Malaysia, an area which has limited exploration. More generally, it contributes to the ongoing discussion in the literature on the relationship between religiosity and ethical decision-making. (shrink)