The problem of admissibility of evidence in the penal cause takes special place because not all evidence is admissible as main tool for defending one’s violated rights and legal interests.In the first chapter of final paper the conception of admissibility of evidence is revealed, the general requirements for the evidence, the rules of admissibility of evidence, peculiarities of violated procedural form of admissibility of evidence are analyzed.In the second chapter the peculiarities of admissibility of evidence are analyzed in the countries of common and civil law. In the third chapter using the practice of courts it is revealed how common rules of admissibility of evidence can be applied practically in different ways.