Conventional crime constitutes the main share of crimes committed in Bulgaria. Its level and trends define the condition and changes in the general criminological situation in the country. The necessity of increasing the law enforcement authorities’ efficiency in countering crime has become one of the highest priorities in Bulgaria after the country’s entry into the European Union. In these conditions, the assessment of conventional crime levels in the country, as well as the performance assessment of the police, is no longer the sole monopoly of the relevant specialized state institutions. The above facts necessitate all the more that conventional crime be assessed in its dynamics by applying generally recognized standards, criteria and approaches.