In the trading world, Islam commands that ethical value is prioritized in life. Therefore, Al-Qur’an has clearly and firmly set values and moral system to manage and facilitate the running of economy and business traffic of human. In this globalization era nowadays, business people rarely even do not pay attention any more to business ethics, whereas on the contrary each business person has to be responsible for the product they produce or trade to the consumers. This matter is based on considering the weakness of the consumer position that often becomes the object in the business activity for the business people that expect maximum profit compared to the position of the business people that is relatively stronger in many things. This research aims at finding out the practice/application of member card on the trading transaction in Yogyakarta Baitul Muslim Assidiq store and find out the objective of Islamic business ethics and the regulations of consumer protection towards the application of the member card. The type of this research is qualitative research that is descriptive analytical that describes the practice/application of member card on the trading transaction in Yogyakarta Baitul Muslim Assidiq store, that is then observed from the perspective of Islamic business ethics and the regulations of consumer protection. From the result of the writer’s research, it can be concluded that the facilities provided in the member card are already appropriate with the provisions and regulations that allow the application of it. It is explained by contemporary ulamas (religious leaders), that when both sides give benefit to each other and no one loses in the application of member card, therefore the transaction is appropriate with the provisions and regulations. In the practice, there is no charge in getting the member card and expiry date so that the consumers do not experience a loss. The member card application in Yogyakarta Baitul Muslim Assidiq store is also appropriate with the Islamic business ethics and the regulations of consumer protection in which the trading is conducted with transparency and no party experiences a loss