Traders in traditional markets often exhibit behaviors that contradict Islamic business ethics. Therefore, the actions of such traders are influenced by Islamic business ethics. This study focuses on how traders understand these ethics and behave based on them. This study employed a qualitative methodology. A purposive sampling technique was used to select informants. Respondents were selected based on factors relevant to the research objectives. The data collection methods were interview, observation, and documentation. The results show that traders' perceptions of Islamic business ethics are evident in their trading practices. They know how to trade in accordance with these ethics. Additionally, the majority of traders in the market have applied Islamic business ethics. Traders use the five principles of Islamic business ethics: tawhid, balance, free will, responsibility, and ihsan. However, some traders do not follow these ethics. Examples include not praying at the time of entry, treating buyers differently, and selling poor-quality goods.