A preliminary survey of a three year results of investigation of the synanthropic vegetation in the Biosphere Reserve East Carpathians is presented. 34 ruderal communities of classes Artemisietea vulgaris, Galio-Urticetea, Bidentetea tripartiti, Chenopodietea, Plantaginetea majoris, Molinio-Arrhenatheretea have been registered. Among them the trampled communities are most distributed. This paper represents the first more complete survey of the synanthropic vegetation of the Biosphere Reserve East Carpathians.