Study performance changes of synantropic vegetation in Lublina what passed in period more 40 years. In this aim was confronted investigations was made in 2005–2009 with results of investigations executed in 1960–1962 and 1966 by prof. the D. Fijałkowskiego. Comparison shows on change differentiation happened in synantropic community. We was observed getting reduction segetal community from Stelarietea mediae from 8 to 3. It is the consequence the diminishing part of city as manufacturer of food, as well as lying fallow these terrains. Almost identical the superficial changes on ruderal community. This is connected from reduction refuse ground, dump ground, different building standards. It grew up from 8 to 10 but their part diminishes in scenery of city. It the growth of community was has noted down was stepping out on waste lands as well as it grows green from 19 terrains to 26. Interesting is adapted appearing synantropic vegetation to large salinity as well as resistant on contamination soil chemical substances. In spite changes in occurrence and the differentiation the synantropic community they have still the significant part in scenery of city and they should be used in creating the ecological system of city and initiation idea sustainable development.

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