This paper analyses the influence of the mass media on the perception of beauty among the secondary school children. This research was motivated by the awareness of the fact that we are surrounded by the media images of unrealistically beautiful people on everyday basis. In the Western society of the 21st century it is quite a challenge to have a healthy perception of physical appearance and beauty when the image of beauty imposed by the mass media is not healthy at all. One of the research goals is to determine how much influence the mass media have on the respondents. The other goal is to compare the results of male and female respondents. Throughout the paper, the comparative analysis is presented in order to understand who is under a stronger influence of the mass media, and how the media content affects the self-image and the perception of physical appearance of other people. The paper starts with theoretical assumptions and previous research overview in order to get an insight into the subject matter and to see if this research brings any changes compared to the results of the previously conducted researches. After the theoretical part, the analysis divided into four parts is presented. Besides analyzing the influence on the perception of beauty by the mass media such as television, advertisements or the Internet, the research also includes the analysis of the mass media impact on the behavior on the Internet social networks by the surveyed respondents. The end of the paper discusses the initial hypotheses, makes a conclusion based on the results, and proposes solutions for the existing problem.