Technical Abstract: Eriophyoid mites can be considered as a group of high potential as adventive mite species (AMS) because they are very small and difficult to detect and some species have become widely distributed with increased world trade. Economic, social and environmental impact due to invasion of some eriophyoid mites has been notorious. Considerable attention has recently been given to the invasive insect species. However, adventive mites have received only little attention and available information and knowledge are scarce particularly in the case of eriophyoids. This paper summarizes information on adventive eriophyoid mites and their impact, presenting the history of some important invasions. The status as adventive species of eriophyoids introduced as biological control agents of weeds is discussed. A list of eriophyoid mites that have been reported as invasive species around the world is shown. Pathways of concern and biosecurity actions to reduce the risk of eriophyoid mites are discussed. The need for raise public awareness of the risk and importance of these tiny organisms as AMS is emphasized. Scientific and technical challenges to deal with adventive eriophyoids are discussed.