This study aimed to examine the perceptions of users about the ease of access to actions and services of the Single Health System (SHS). Qualitative study conducted with 24 users of SHS in a federal hospital in Rio de Janeiro. In collecting data was used the technique of semi-structured, the analysis was performed using the technique of analysis of thematic content. The Subjects recognize the access to various services of the SUS, as well as factors associated with such access, as the referral process, the luck and the belief in God. It was possible to verify the existence of a positive attitude about the health system, as well the identification of a set of its principles.