<p> In recent years, the phenomenon of "Winner takes all" has been pointed out as a tendency of new urbanization （Florida, 2017）. In other words, in some cities （superstar cities）, population/economic scale, number of start-ups due to venture investment, number of millionaire, etc. are overwhelming other cities, concentration of wealth is occurring. On the other hand, the original urban residents are driven to the suburbs and are becoming marginalized （Gentrification）. In order to survive fierce global competition and realize its high creativity, cities are making policies to attract creative classes （CCs） and at the same time to involve the social weak （low income, elderly, disabled people, social minorities, etc.） into the process of development to achieve sustainability. In particular, to solve the social problems that global cities have, social innovation from the viewpoint of social business related to urban agriculture created by CCs such as urban agricultural creators seems to be effective.</p><p> The purpose of this research is to clarify the relationship between multi-functionality of urban agriculture （MFUA） as city amenity and creative classes （CCs） for Tokyo and Shanghai which are two global cities in Asia. Specifically, based on existing studies on creative classes （CC）, multi-functionality of agriculture （MFA）, social capital （SC） and social business （SB）, we constructed a model showing that these factors contribute to the sustainability of global cities, and verified the model through the covariance structure model （SEM） analysis using the authors' original questionnaire survey targeting the residents in the two cities. In addition to creative classes based on traditional creative occupations, we also focused on CC based on Creative Thinking, their orientation toward multi-functionality of agriculture and the relationship with social capital, and how they engage in social business. </p><p> The following results are obtained from our analysis. First, the creative classes （both creative occupation and creative thinking） in Tokyo and Shanghai prefer multi-functionality of agriculture than non-CC （Hypothesis 1）, such tendency is more strongly evident in Tokyo. Secondly, people who are creative thinking in both cities have a high level of social capital （Hypothesis 2）, and strong willingness to participate in social business （Hypothesis 3）. Based on the analytical results, we draw the implication for urban policies to facilitate CC （both creative occupation and creative thinking） to actively participate in the social businesses by making full use of multi-functionality of agriculture in order to solve the social problems in global cities.</p><p>JEL Classification:R11</p>