State-Owned Enterprise (SOEs) are business entities owned by governments. Unlike private enterprises which operate on profit-motivation, SOEs often act on motives different from profit-making such as fulfilment of governmental or political purposes. Due to this peculiar feature, activities of SOEs sometime are disruptive of competitive market. In order to regulate activities of SOEs so that international market would not be unduly disturbed, GATT: Article XVII states that SOEs shall operate on a profit-motive in international trade. More recently, CPTPP (Comprehensive and Progressive Agreement on Trans-Pacific Partnership) and other FTAs include chapters devoted to the regulation of SOEs which provide that Contracting Parties ensure that their SOEs act on profit-motive so as not to cause disruption to the international market. On the other hand, competition laws of trading nations provide rules for prohibiting abusive conducts of dominant enterprises and this includes the prohibition of abuses by SOEs. However, applications of those two sets of regulations (GATT and CPTPP on one hand and competition laws on the other) are made independently from each other without being coordinated. This article surveys details of regulation of SOEs under CPTPP as a representative example of FTAs regulation and of competition laws of nations and suggests ways in which those two sets of rules can be coordinated in order to increase the effectiveness of legal disciplines imposed on SOEs’ activities.