Advertising is the primary communication tool between brands and consumers. Due to its omnipresence and significant impact, advertising bears a great responsibility in conveying messages that influence the shaping of individuals' perceptions, attitudes, and behaviors in society. When establishing and nurturing relationships with potential customers, advertisers sometimes resort to unethical practices, neglecting their societal responsibility and negatively affecting individuals. The emergence of unethical communication, with an emphasis on stereotypes and sexism in advertising, underscores the need for greater societal accountability in advertising. The main aim of this paper is to examine the attitudes of the targeted female audience regarding the impression and impact of theOl Istria advertising campaign, and to assess the consequences in forming public attitudes, which serves as an example of harmful stereotype usage. In the theoretical part of the paper, advertising, ethics in the communication sector, stereotypes in advertising, and the contemporary portrayal of women in advertising are explained. In an effort to gain a clearer insight into the research problem, the quantitative method of surveying was employed to verify respondents' opinions on the subject. The convenientsample consisted of women aged 18 and above, as the research aims to deepen the understanding of women's opinions on sexism and advertising. By restricting the study exclusively to women, the intention was to gain a more precise insight into actual statistics, reactions, and experiences with sexist advertisements. Based on the obtained results, it can be concluded that respondents perceive the advertising in the Ol Istria campaign as unethical and not contributing to gender equality. In conclusion, the research results confirm the utility of more carefully selecting marketing communication in campaigns, as well as employing ethically grounded tools and techniques.