In urban planning, access to public spaces provides social relations for citizens. The goal of this paper is to evaluate the elderly's requirements in public spaces (case study of Sheet Bazaar, Zanjan, Iran) in order to recognize and classify their strengths and weaknesses and present more appropriate and effective strategies for their improvement. In this research, the related literature on old age and requirements of the elderly in public open spaces was reviewed and the factors affecting their use of physical places were determined at the first stage of the study. After reviewing the literature, some observations on the elderly were made and questionnaires were given to 80 users with the age of over 65 years old to serve the purpose of this study. The results of the questionnaires indicate that the frequent problems of the elderly in public open spaces were identified as follows: pollution (24.8%), pavements and roads (24.6%), traffic (14.4%), safety (12.2%), insufficiency of maintenance and management (9.6%), and socio-cultural problems (5.3%). In addition, the result of the observations in the main research area shows that the design properties had the highest and maintenance-management services had the lowest success percentages. In the end, some solutions were presented for designing new public open spaces and developing the existing spaces.