Djeca ulaskom u predškolsku ustanovu povećavaju svoj rizik za oboljenje od različitih bolesti. Odgojitelji kao djelatnici koji su u prvom, ali i najdužem kontaktu s djecom za vrijeme boravka u skupinama važan su prediktor u procjeni stanja djeteta. Prepoznavanje rizičnih čimbenika i pravovremena reakcija odgojitelja je bitna kako bi se zaštitilo zdravlje djece u kolektivu. Istraživanje se provelo u više predškolskih ustanova Trogira i okolice, gdje je uz pomoć anketnog upitnika, ispitano znanje odgojitelja o poznavanju najčešćih bolesti i njihovoj prevenciji kod djece. Cilj istraživanja je ispitati znanje odgojitelja predškolskih ustanova o najčešćim bolestima i njihovoj prevenciji kod djece rane i predškolske dobi. Rezultati istraživanja o znanju odgojitelja o bolestima djece su bila nešto lošija, dok su odgojitelji puno bolje znali o prevenciji samih bolesti. Razlika između odgojitelja s više odnosno manje od 20 godina radnog staža nije bila značajna osim u pitanju o cijepljenju. Iz rezultata istraživanja možemo zaključiti da odgojitelji koji rade u 10-satnim programima će se češće susretati s bolesnom djecom od odgojitelja koji rade u kraćim programima, kao i da će odgojitelji s više od 10 godina radnog staža prije primiti djecu u skupinu koja pokazuju znakove simptome od odgojitelja s manje od 10 godina radnog staža. Također, iz istraživanja je dokazano kako odgojitelji mlađi od 40 godina smatraju da je potrebnije imati više nastave i prakse o bolestima i prevenciji kod djece rane i predškolske dobi za vrijeme studiranja od odgojitelja starijih od 40 godina. Zaključak: Odgojiteljima koji rade u predškolskim ustanovama je potrebna kvalitetnija edukacija, počevši na fakultetima s više teorijskog i praktičnog dijela. Edukciju odgojitelja o bolestima i njihovoj prevenciji je potrebno provoditi tijekom cijelog radnog vijeka. By entering preschool, children increase their risk of contracting various diseases. Educators, as employees who are in the first and longest contact with children during their stay in groups, are an important predictor in assessing the child's condition. Recognition of risk factors and timely reaction of educators is essential in order to protect the health of children in the collective. The research was conducted in several preschool institutions in Trogir and the surrounding area, where with the help of a questionnaire, examined knowledge of educators about the most common diseases and their prevention in children. The aim of the research was to examine the knowledge of preschool educators about the most common diseases and their prevention in early and preschool children. The results of the research on educators' knowledge about children's diseases were worse, while educators knew much better about the prevention of the diseases themselves. The difference between educators with more or less than 20 years of experience was not significant, except in the question of vaccination. From the results of the research, we can conclude that educators who work in 10-hour programs will encounter sick children more often than educators who work in shorter programs, as well as that educators with more than 10 years of work experience will sooner admit children to the group that show signs of symptoms from educators with less than 10 years of work experience. Also, research has shown that educators under the age of 40 believe that it is more necessary to have more classes and practice on diseases and prevention in early and preschool children during their studies than educators over 40. Conclusion: Educators who work in preschool institutions need better quality education, starting at colleges with more theoretical and practical parts. It is necessary to educate teachers about diseases and their prevention throughout their working life.