This article is devoted to the associations formed by mine workers for the exploitation of the Laureotic mines during the 4th century BC. An attempt is made to clarify the rights and obligations of the partners of these associations, as well as the principles which funded the distribution of those rights and responsibilities between them. The texts of the Attic orators are the starting point of this study. Comparisons are then made with tax-farming and Athenian public contacts, but also with private conventions known by Egyptian papyri. The liability of business partners in Athenian laws is also discussed.