Boredom as part of leisure time is extremely important in the daily lives of individuals, especially adolescents. Boredom is a complex phenomenon characterized by heterogeneity of meaning and divergent interpretations. It is a relatively unexplored but extremely important area of research with enormous potential. In addition to being an integral part of adolescents' leisure time, recent research proves that more and more adolescents are bored in their free time, which entails many, mostly negative consequences. The aim of this study was to examine attitudes and perceptions about the characteristics of feelings of boredom in free time from the perspective of a certain age group – adolescents. The problems of the research are focused on the frequency of feelings of boredom in the free time of young people with regard to sociodemographic features and the type of leisure activities, as well as the attitudes and perceptions of adolescents about the connection of feelings of boredom with environmental situational factors, risky behavioral styles, and perceptions of educational institutions and the work of educational workers. For the purpose of the survey, a survey was conducted online on a suitable sample of 234 respondents aged 15 to 24 years. The results of the research confirmed a statistically significant difference in the frequency of feelings of boredom in leisure time with regard to age, material status of subjects, and type of free time activity. Correlation analyses confirmed the statistically moderate correlation between the frequency of feeling of boredom and poor environmental situational factors, the frequency of risky behaviors, and poor quality work of professors in class, and the statistically weaker association between the frequency of feeling of boredom and the perception in risky behaviors of other people.