The bachelor thesis deals with the behaviour of poker players, which can be encountered in the game of poker. In my work I am gradually engaged in non-verbal communication, verbal communication and the ethics of poker players. In the section of non-verbal communication, I analyse individual parts of the body from the most important for reading to the least important. I also deal with psychological effects that can greatly influence the behaviour of the players. In the section of verbal communication, I focus mainly on what verbal communication in poker can serve and how to use this knowledge. In the last part I present the issue of ethical behaviour. In the practical part I use the knowledge from my own research as well as the knowledge of ...