Students as future prospective accountants need to be tested for their perceptions of ethical behavior to find out how far they can behave ethically in the future. Since some dysfunctional behavior emerged in accounting profession, decreased public trust would become a critical issue in the field. This put the importance to examine prospective accounting professionals perception on ethics and some factors which affect. This study aims to investigate the influence of internal locus of control, idealism, ethical knowledge, and gender on the ethical perceptions of accounting students. A survey is conducted on 136 students as respondents. The results showed that idealism and ethical knowledge confirmed to have positive effect on the ethical perceptions of accounting students. Surprisingly, however, internal locus of control and gender had no effect on the ethical perceptions. Meaning, student’s perception on ethics is influenced by the believe that consequences of actions can occur without violating moral values. Moreover, ethical knowledge possessed by the students can be the basis of their perception on ethical behavior. This would imply that higher education institutions as the learning ground of future accountants should design and develop courses which stimulate soft-skills to foster confidence in controlling and solving problems without ethical violation. Additionally, student’s knowledge should be strengthened by the means of ethical training and professional ethics courses built in the curriculum.