This thesis analyzes the communication in sustainable marketing, whose presence in today’s business is significantly increasing. After decades of systematic destruction of the environment and facing adverse climate changes, society is becoming aware of the problem and recognizing the need for change. The care about the environment, social welfare and future generations is becoming important as well. The change of society's awareness has forced the implementation of sustainable marketing, which is based on the principles of ecological and social sustainability and seeks to satisfy the customers while not compromising their future. Communication as a process of transferring information, ideas and feelings to reach consumers and understand their desires and taste, is the essential part of sustainable marketing. Therefore, the purpose of this thesis is to analyze the importance of communication and explore the forms of communication in sustainable marketing, both in theory and within the furniture manufacturer IKEA. Communicationin sustainable marketing consists of advertising, sales promotion, personal sales, public relations, direct and interactive marketing and marketing by word of mouth. In advertising it is important to mention television, radio and the internet as the media of the utmost reach and great power of suggestion in matters of social and environmental well-being. In public relations, donations and sponsorships are forms of indirect marketing that contribute to corporate image and show that businesses pay attention to sustainability. IKEA is a company that has recognized the effect of climate change and the importance of environmental sustainability and social prosperity. For years, its entire business adapts to sustainability and gives the impression of a company who cares about the community and by introducing sustainable marketing it attracts customers and ensures their loyalty.