Informal work in Colombia has generated great interest due to the presence of occupational hazards in the population. The objective of this research is to describe the conditions of Safety and Health at Work in the Informal Workers of the Villa de San Diego de Ubaté Market Square. This is quantitative research, descriptive in scope. A data collection instrument was designed to be applied to 183 workplaces in the marketplace. Descriptive statistics and measures of central tendency and dispersion were applied. The results show that only 25% contribute to the health system; however, of this 25%, 20% contribute to health, 3% to pension and 2% to ARL, additionally, the knowledge related to hazards and risks identified in their workplaces is not clear, --generating confusion in the terms. Similarly, the term "risks" is unknown, therefore, the identification of unsafe acts and conditions is not clear to workers. For the development of this article, review works on working conditions in marketplaces in Colombia and informal work were selected, to analyze and make known, which are the most important characteristics within this population and determine how to work to improve them, as well as to implement strategies to improve their working condition