In this paper, the hygiene in the age of coronavirus among the students of lower grades of primary schools, is studied. In the introduction it is talked about hygiene in general and its implementation. There is talk of health and health education, hygiene at school, infectious diseases and the new coronavirus that hit the world at the end of 2019. Guidelines for the prevention and spread of coronavirus are provided, which all schools should follow. A study on hygiene during coronavirus is being conducted among lower grade students in the city of Osijek. Two primary schools in the city of Osijek participated in the research: Fran Krsto Frankopan Elementary School and August Šenoa Elementary School. The aim of this research is to see whether the current hygienic and sanitary conditions meet the standards that ensure the proper growth and development of children in schools in the age of coronavirus. One of the goals is to investigate the hygiene habits of students in the lower grades of primary school in the age of coronavirus, whether they maintain their hygiene independently, whether they are satisfied with their hygiene habits and whether they are bothered when someone does not maintain hygiene. In the end, it will be concluded how students implement hygiene in school and whether they care about it to a greater extent in the current situation when there is a coronavirus pandemic than before. For this purpose, a written survey containing 16 questions was used. The sample for this research consisted of 188 students from the first to the fourth grade. The survey took place in May and June. According to the research the current hygienic and sanitary conditions meet the standards that ensure the proper growth and development of children in schools in the age of coronavirus. Most students feel safe staying in school during the coronavirus and are not afraid that they might get infected while staying in it. The hygienic habits of the surveyed students are very good. The students and their families take care of hygiene to a greater extent in the current situation opposed to when there was no pandemic.