Objective: This study was conducted to investigate the effect of poverty culture on sustainable social development among urban households aged (30-50 years) in Kahnouj city in 1404. Method: The method of the present study was a descriptive correlational survey. The statistical population of the study included all urban households aged (30-50 years) in Kahnouj city in 1404, which according to the Kerman Provincial Statistics Center is 22,497 people, of which 378 people were selected as the sample size using a 3-stage quota, cluster and simple random sampling method and according to the Cochran formula. In order to collect data, two poverty culture questionnaires from the perspective of Basatian (2011) and the sustainable social development questionnaire from the perspective of Mokhtari Malekabadi et al. (2014) were used. The Culture of Poverty Questionnaire with 15 questions and validity and reliability of 0.89 and 0.91 respectively, and the Sustainable Social Development Questionnaire with 40 questions and validity and reliability of 0.88 and 0.90 respectively were used. All statistical analyses were performed using SPSS and PLS computer software. Findings: The results of data analysis show that the culture of poverty has a significant impact on sustainable social development in Kahnouj city. Conclusion: In an environment where cultural poverty prevails, people go beyond the normal limits of their lives and move towards negative luxury, which results in the promotion of chaos, the growth of economic, social and cultural disasters, and as a result, the lack of sustainable social development.