The topic of the bachelor thesis is "Game Theory in Business". Game theory is a part of the field within economics that originated originally from mathematical propositions. It deals with the analysis of strategic problems in different environments. Game theory is encountered in decision-making processes, family quarrels, price increases, marital decisions, the election of the UN Secretary-General, the use of natural resources and various other areas. As there is a growing need to explain natural phenomena, interpersonal relationships and business, there is also a growing need to develop game theories. It is a discipline that is represented by mathematical models and interrelationships. The idea is to present the application of game theories as a desirable factor in the processes of making important decisions. Nash equilibrium can give the answer to the question of what is the balance between someone’s and our own decision and interests. Game theory analyzes the scenarios and outcomes of all potential strategies between two or more players. How one player’s strategy affects another and vice versa. Game theory as a discipline and a factor in the decision-making process can provide great insight into your potential gains or losses. Whether you are an entrepreneur, politician, customer or student, knowledge from this field of science can prosper and avoid a missed opportunity / opportunity cost. It becomes an important advisor in devising a strategy in everyday life. In order to change the market situation, one or more decisions needed to be made. Game theory helps us decide which decision to make in each situation. Conflicting situations are diverse and numerous, so many games can be formed according to these scenarios.