Theme of this thesis is internal communication in company OSMA zpracování plastů, s.r.o.. Main aim is to find out the ways and quality of communication in this company. Text is divided into three parts. As a first step the methodological solutions are defined. These are aim and subject of the work, hypothesis about communication in company OSMA and methods of solution. Next theoretical part describes the social communication and consequently focuses on communication inside the company. The crucial part of this thesis is practical part. It contains interpretation of the results, verification of given hypothesis and suggestions how to improve findings.