This research presents an ergonomic evaluation the physical aspects of urban squares, developed based on the opinion of the population. Furthermore try to comprehend the relation between the urban furniture and the square visitors, and its importance in the existence of the space called Square - public open spaces, leisure, living, to challenge, to live. This analysis took place in Rio de Janeiro, turning easier the process of field research. From an initial selection, some carioca squares where evaluated through the application of techniques, with the objective of understanding its system and functionality. Eventually only one square was chosen as the object of study: the Edmundo Bittencourt Square. From the results obtained through the methods applied during this research, it was possible to evaluate the real importance and influence of the urban furniture in the considered environment in which it was built. It was identified a difficulty among part of users to understand the public space as a set of objects. The design, comfort and quality of the urban furniture remained in the background, in front of accessibility, cleanliness and the environments comfort.