The purpose of this research is the investigation of behavioral changes and awareness levels of pre school children in the pandemic process (COVID-19) by referring to mothers' opinions. The research wascarried out by using interview technique, which is one of the qualitative research methods. The sample of thestudy consists of 30 mothers who have 3-6 years old children who receive preschool education selected by thesnowball sampling method. Before this study was carried out, Bingöl University Scientific Research andPublication Ethics Committee was consulted and the required ethics committee permission was obtained withthe date and number of documents 13/05/2020-E.8499. In the research, “Personal Information Form” createdby the researchers and “Interview Form” created by the researchers with the expert opinion were used as datacollection tool. As a result of the research, it was detected that children have increased awareness of the diseaseafter the pandemic, children generally know what COVID-19 is, families usually talk with their children afterthe pandemic, children perceive the virus as dangerous and interpret the virus in different ways. In addition tothat the majority of mothers stated that their children did not have emotional and behavioral problems beforethe pandemic, but after the pandemic process; behaviors such as “anxiety, fear, aggressive / angry / furiousbehaviors, excessive mobility, sister-jealousy, parent-dependency” appeared in their children and it was also found that the mothers stated that the perception of healthy nutrition occurred in their children after thepandemic. In addition, it was shown that the sleep patterns of the children are disordered and irregular after thepandemic process. It was also shown that there is an increase in children's hand washing habits after thepandemic and the majority of children follow the 20 seconds rule while washing their hands, children use thecommunication tools a lot, are nervous about going out after the pandemic and they know the social distancerule, the time that mothers spend with their children and time to play with them increased after the pandemic process.