In this thesis is considered the meaning and importance of the game in the teaching of mathematics, the children's aspect of the game, the game in teaching and the application of games itself. Games in teaching have been shown through various researches as a very effective way of learning, especially because games are very close to children and through games children not only learn mathematics and mathematical concepts in a fun way, but also develop important social, emotional and cognitive skills that are key to their overall development. The game in class is not only used to fill the school hour, but is equally represented as other activities. After the theoretical part, there are also games that are suitable for a mathematics lesson in class. Some of the games were also elaborated and presented in preparation for a mathematics lesson in the form of guidelines and suggestions for implementation in a school mathematics lesson. Although the implementation of games in the teaching of mathematics is challenging, considering the need for adequate preparation of teachers, the benefits resulting from this approach make it worthwhile. It is a well-known prejudice that students and their parents think that mathematics is a difficult and demanding subject, but the game as a teaching method offers an innovative way to make mathematics more accessible and interesting, encouraging students to approach learning this important subject with joy. Incorporating games into lessons can improve cooperation among students, encouraging teamwork and joint problem solving, which further contributes to the development of their social skills. With all these advantages, it is clear that the game can be a powerful tool in the hands of teachers, making mathematics not only more understandable but also beloved among students. This paper aims to provide examples, guidelines and suggestions to help teachers implement games in mathematics lessons.