Elaeagnus umbellata, known as Autumn olive and growing widely in Asia and Southern Europe, is a shrub tree used in thetraditional treatment of many diseases, including cancer. In the study, methanol extract of E. Umbellata fruit was prepared. The activity of the extract on 11 microorganisms was determined by the agar well diffusion technique. The anti-quorumsensing activity of the extract was tested using Chromobacterium violaceum ATCC 12472, and the anti-biofilm and anti-swarming activities were tested using Pseudomonas aeruginosa PAO1. Cytotoxic effect of the extract against pancreatic tumoral cellline (AR42J), breast cancer cellline (MDA-MB-231), lung adenocarcinoma cellline (A549) and normal epithelial cellline (Vero), and antiviral effect of the extract against herpes simplex virus type-1 was researched using the MTT method. It was determined that the extract was moderately effective against 6/11 microorganisms and showed anti-quorumsensing activity. While the extract did not have a cytotoxic effect on cancer celllines, it was found to have a cytotoxic effect on Vero cells at concentrations of 100µg/mL and above. However, no anti-biofilm, anti-swarming and antiviral activity of the extract was observed. The study shows that E. umbellata fruit has limited biological activity.