Background: The density of Human Resources for Health (HRH) at Peru has exceeded the threshold set by WHO to ensure coverage of health services, which is 25 per 10 000 population. However this national average could masks regionally HRH densities that could be below the stipulated threshold, particularly in poorest areas. As a result it is necessary to study the existence of possible inequities in the distribution HRH inside the regions. Inequity must be understood as the unnecessary, avoidable, and unjustified lack of HRH. Objectives: To determine inequities in the distribution of HRH at health care services of four poor regions of Peru (Cajamarca, Loreto, Apurimac and San Martin). Design: Cross sectional descriptive study. Institution: Dirección General de Gestión de Desarrollo de Recursos Humanos of Ministry of Health. Methods: Density of HRH for each region was calculated. In order...