Traditional market is an important aspect in the national trade system. At present the management of the traditional market in Indonesia is still not well implemented and is being improved on traders who pollute the environment. The purpose of this research is to analyze the internal, external, demography, and situational factors on pro-environmental behaviour. This research was conducted at Pasar Mayestik, Ibuh Market, and Pandansari Market. The method is giving questionnaires and interviews to traders at traditional market. Research analysis uses successive intervals and ANCOVA tests. The results of the research is there is a significant influence between internal factors (knowledge of environmental management), demographic factors (age and formal education level), and situational factors (income) on pro-environmental behavior, except for external factors (trading experience). Partially, Pasar Mayestik has no significant factor influence, Pasar Ibuh has an influence on demographic and situational factors, and at Pandansari Market internal and demographic factors (formal education level). Furthermore, internal and demographic factors is the factor that most influence pro-environmental behavior and also as a key factor in achieving a sustainable city.