Opening our country to Europe and to the world, produced with the entry into the European Union has encouraged both the free movement of persons and goods in different categories, mainly those of agricultural origin. Cultural and economical exchanges is an positive aspect, but they appear with ways of introducing and disseminating our country a new species, from areas of remote area that is geographically located in Romania. The consequences of these mobilities are easily found: the emergence of crop pests or us at wild flora; competition in food sources; absence of predators or parasites specific; artificially changes in biodiversity . This paper proposes updating the information on invasive species of plants and animals known to be present in our country at present, objective analysis of the main ways of spreading and disseminating the main factors.