We are witnessing that today more and more people suffer from allergies. They are manifested through bronchial asthma, puffy horn, irritation and itching of the skin, rash, eye blindness, nasal congestion or some organ dysfunction and functioning of the body. Allergy causes, so-called allergens, are constantly increasing. Allergic diseases are not only caused by pollen, animal hair, dust, or various types of fruit. Allergic illnesses can be produced by consuming, or in contact with drugs, different types of food or cosmetics. The quality of life of people suffering from some type of allergic disease is certainly more vulnerable than in people who do not suffer from them. I can say that some of them really limit the movement in certain seasons, the consuming of certain types of food, or the inability to work in relation to other pupils. The theme of this graduate thesis is the influence of allergic diseases on the quality of life of younger school children. With this work I have tried to answer the following questions in more detail: What are allergic diseases, types of allergic diseases, what the symptoms are, how to treat them and how they affect the quality of life. In the theoretical part of the my work, I will explore the development of allergies, how and why they are produced, how they affect the function of the organism, the importance of blood groups in the fight with allergies and present some tips to improve the quality of life with them. Graduate thesis presents a survey conducted written by a survey in the period from 27 February to 26 March 2017 completed by pupils of the Elementary School of Brothers Radić in Pakrac, the Primary School of Fr Kaje Adzic in Pleternica, Elementary School Zdenko Turkovic in Kutjevo and Primary School of Julija Kempfa In Požega.