Intensive drug uses against species which have clinical significance and cause severe diseases have triggered the development of resistance in these species. It is necessary to discover new potential drugs against cli- nical isolates because many antimicrobial drugs become ineffective in the coming years. In this research, we used different extracts from Trametes versicolor fruiting bodies for investigating antibacterial and antifungal activities on some clinical isolates. For this purpose, five bacterial species (Staphylococcus aureus, Entero- coccus faecalis, Bacillus subtilis, Escherichia coli and Pseudomonas aeruginosa) and a fungal species (Candida albicans) were selected as clinically important isolates and four different crude extracts (chloroform, water, ethyl acetate and ethyl alcohol) of Trametes versicolor were tried on these species in terms of antimicrobial sensitivity with disc diffusion method. Obtained data were analyzed using SPSS 14 software. At the result, some of extracts were found to have antimicrobial activity on clinical isolates although all extracts generally show antimicrobial effect. Chloroform extract was found to have the highest antimicrobial activity on S. aureus and E. faecalis while ethanol extract was observed as more effective on P. aeruginosa, E. coli, B. subtilis and C. albicans isolates. It can therefore be suggested that, some of Trametes versicolor extracts are promising antimicrobial agents.