This paper explores work conditions in the third sector (non-profit sector). Separated from the profit sector (first sector) and the public sector (second sector), the third sector includes autonomous organizations legally established, with non-profit purposes and an important component of voluntary contributions, and aiming, most of the time, to resolve social problems, to improve work conditions, and to include users and consumers in the management. Recent data show that, in fact, the wage earner relation takes many forms in the third sector, because organizations are more or less taylorist and, at the same time, more or less politically inclusive for the workers. At least five phenomena explain that: social trends in work conditions; actions of the State; territory; production-related activities; size of the organization; and social movements.