<![CDATA[This study aims to analyze the form and mechanism of the musyarakah contract and examine the implementation of trustworthiness (amanah) and justice in the Mentari Bra Wholesale Business at Aur Kuning Market, Bukittinggi, from the perspective of Islamic Economic Law. This study employs field research with a juridical-normative approach. Data were collected through interviews with the business owner, the musyarakah partner, and supporting employees, as well as documentation. The data were analyzed descriptively using fiqh muamalah theory and the DSN-MUI Fatwa on musyarakah. The findings reveal that the partnership applies a syirkah inan contract between Hendra as the business manager and Desniwati as the capital partner, with unequal capital contributions and profit-sharing based on a mutually agreed ratio. In general, the partnership reflects the principles of amanah and justice through cooperation and an agreed profit-sharing arrangement. However, part of the business capital was used for personal purposes without the partner’s consent, indicating a breach of trust and a failure to fully uphold the principles of Islamic Economic Law. This study concludes that the validity of a musyarakah partnership depends not only on mutual agreement but also on responsible capital management, transparency, and fairness between partners. Academically, this research contributes to the study of Islamic Economic Law by demonstrating the importance of applying the principles of amanah and justice in the practical implementation of musyarakah contracts.]]>
