Trade disputes under the World Trade Organization (WTO) arise when one member (state or other independent custom territory), by its unilateral measures, violates its obligations determined by the WTO agreements, and thus causes the damage to another member. Motives for violation of obligations can be various, but that is usually protection of domestic industry from abroad competition, or export promotion of domestic industry. Trade disputes do not occur by accident and at random, but are almost always the result of some specific economic or political activity. Almost each trade dispute occurs due some problems that commercial participants on the market have to face with, having that those problems relate to specific measure of some WTO member. The subject of dispute can be different, but in trade practice the subject is, in most cases, about issues which relate to custom law, custom tariffs, tariff concessions, violation of most-favored nation status, or violation of national treatment principle. Literature and practice provide a number of typologies of disputes, from which the most important (according to author) are mentioned and explained in this article.