This study investigates the sociodemographic factors associated with self-report of common mental problems by the psychologically distressed in order to gain insight into the profile of the population subgroups least likely to receive mental health support whenever needed. Data from the 2006-2008 french National Survey on Health, Health Care and Insurance, were used, measuring psychological distress based on the Mental Health Inventory MHI-5. The patterns associated with education, employment situation and living arrangement were investigated in a sample of 11,543 subjects aged 30-54 years. Men with lower educational level were found to be doubly disadvantaged, as they were more subjected to distress than those with higher educational level and at the same time less likely to report common mental problems whenever distressed. While in both genders subjects not living with a spouse and non-employed subjects were also more subjected to distress, they were more likely than the others to report common mental problems in presence of distress. The findings were discussed in terms of living conditions, stigma, mental health literacy and help-seeking behaviour. Mental health promotion programmes should aim at educating the public, and particularly men and the lower educated public, on the signs of distress and their significance.