Rosavin is a cinnamyl alcohol glycoside found in the plant Rhodiola rosea. It is thought to be one of the compounds responsible for the antidepressant and anxiolytic actions of this plant, along with salidroside. Salidroside and rosavins (rosavin, rosarin, and rosin), biologically active compounds of Rhodiola rosea L., were analyzed in dried roots and rhizomes of the plants cultivated in Lithuania and naturally growing in Altai geographical region in Russian Federation. The quantitative analysis of the aqueous-ethanolic extracts prepared by percolation was performed employing solid-phase extraction and thin-layer chromatography followed by densitometric determination. Similar amounts of salidroside were found in the extracts, irrespective of the origin of the crude plant; however, the differences in the profile of rosavins were substantial with higher content of total rosavins in the extracts obtained from the plant cultivated in Lithuania.