Bcl-2 gene is an important factor in regulation of apoptosis as an inhibitor of this process. Its increased expression is observed in numerous neoplasms, what points out on importance of this gene in the process of oncogenesis. The aim of this paper was to assess the expression of bcl-2 gene in the cells of the glia-derived tumours of the brain. The method of Chomczyński and Sacchi with guanidine tiocyanate was applied to isolate a whole cellular RNA. Expression of bcl-2 gene was measured with a reverse transcription method by a synthesis of cDNA and amplification of gene fragment with specific oligonucleotides in polymerase chain reaction (RT-PCR). The expression of bcl-2 gene was found in cells of all examined glial tumours at the level of transcript. We carried out the discussion of the results and an attempt to explain the importance of bcl-2 gene expression of these neoplasms.