In the recent decades awareness of environmental protection and the need for sustainable development has been increased. In order to be competitive, Croatian companies for wood processing and furniture manufacturing companies are forced to adapt their operations in accordance with the principles of sustainable development. FSC certification provides companies opportunity that through quality management and continuous improvement, with the help of appropriate tools and methods, they can create a system with which they can achieve competitive advantage. Certification of forest resources involves meeting defined standard requirements. Standards can vary to some extent depending on the program of certification, but it could be said generally that they are simple and common to most forest types, regardless of ownership type and applied management system. Most of the standards describe principles, criteria and indicators. FSC certification can be issued only by authorized inspecting organization, and examination of documents and the situation on the ground determines the degree of compliance with the standard. Each certification system needs to be constantly improved. Continuous improvement of the certification system is finding ways to do things better, which means faster, easier, safer and with lower costs, in order to achieve better business results. The objective of this work was to investigate prevalence, advantages, disadvantages and reasons for introduction of FSC certification in wood industry Republic of Croatia. For that purpose for data analysis were used primary (questionnaire) and secondary (www.info.fsc.org) data sources. The research sample were companies from the Croatian who are carriers of FSC certification. List of holders of certificates taken from FSC base (www.info.fsc.org). The questionnaire was sent by email at the address 221. The response rate of employees was 23, 5 %. As the most important reasons for certification respondents cite company image and requirements of the global market, and increase in trust and customer satisfaction. Respondents most often cited the extensive documentation and the high costs of implementation as problems during the implementation of the quality management system. As the main benefits gained from FSC certification company pointed retaining existing customers, attracting new customers and opening new markets. A large number of companies, 94% reported revenue from the sale of certified products and 35% of the company made a profit since the introduction of FSC certificates and 21% of companies increased their selling prices since the introduction of FSC certification.