This study has examined the impact of Poland’s accession to the European Union in 2004 and that of implementation of EU legal regulations in food legislation on the decision of the HACCP being implemented by middle and small size food production companies in Poland. Problems accompanying the system implementation and advantages ensuing it were reviewed. The biggest problems included the necessity of the processing plant incurring expenses and being revamped, incomprehension of the HACCP system idea by employees, and the quantity/quality barrier. The greatest advantage is an increase in employees’ responsibility for production hygiene, improved safety of manufactured products, an increased prestige of the company and its products, a growth in employees’ involvement in their work and enhancement of their qualifications as well as improved safety of manufactured products and maintenance of the market position.