Aim of the study: The aim of this study is to see the level of subjective experiences during the pandemic and epidemiological measures and also to examine the impact of the pandemic on the mental health of adolescents treated through the Day Hospital of the Department of Child and Adolescent Psychiatry. Subjects and methods: A total of 102 subjects participated in the study and they were the patients treated through the Day Hospital. Out of the total number of subjects in the sample, a total of 74 were females and 28 males. The survey questionnaire consisted of three parts. The sample is described by descriptive statistics methods, where categorical data are described by absolute and relative frequencies and numerical data by arithmetic mean and standard deviation in cases of normal data distribution, and in all other cases by median and interquartile scattering as measures of central tendency and scattering. Survey results: Most respondents, 90 of them, state that they talk about their problems with their mother, and none of the respondent stated that they talk about their problems with their father. Female adolescents most often experience symptoms of worriedness when they thought they have been bad at something, and they were always upset after they had an argue with someone. Female adolescents much often felt the chest pain during a pandemic. Both male and female adolescents mostly felt the symptoms of worriedness about the poor performance on the exam. A statistically significant difference was found with sleeping issues during the SARS Covid-19 pandemic between adolescents in different stages of adolescence and those from the middle stage of adolescence had the most difficulty sleeping. Adolescents who are in late adolescence, like adolescents in early adolescence, very often worried when they thought they are bad at something. Adolescents in early adolescence and adolescents in late adolescence often were upset when they argued with others. Adolescents in all three stages of adolescence most often experienced symptoms of rapid heartbeat, fatigue, and lack of energy, and they also had difficulty sleeping. Conclusion: Considering the gender and age of the adolescents, this research has shown that there is no statistically significant difference in the impact of the Covid-19 pandemic on their mental health.