Abstract: The key factors influencing psychological and physiological comfort of urban residents include the level of environmental quality, presence of green spaces, connection between man and nature. The increase in urban density makes the creation of ecological comfort zones especially relevant. The subject of this research is the peculiarities of formation of such zone within the structure of public spaces, taking into account the current requirements to the quality of urban environment. The author highlights special significance of public spaces as one of the key object for creation of ecological comfort zones; as well as examines the key problems in formation of public spaces on the background of dynamic urban development.  Clarification is given to the definition of the concept of “ecological comfort in accordance with the basic parameters. The author substantiates the role of public spaces as the important areas in improvement of the quality of life in a modern city. Having analyzed the modern approaches and trends in designing a comfortable urban environment, the author makes proposals on the formation and modernization of ecological comfort zones within the structure of public spaces, as well as systematizes most relevant requirements to determine promising vectors in designing such objects.