The therapeutic alliance is the agreement that is being built between doctor and patient during the construction process of care. So active collaboration based on a shared assessment of issues and agreement on possible solutions. Initially described in psychiatry, this analytical concept has been extended to several chronic diseases in particular requiring more often a strong link between doctor and patient. His measure is important since it has been demonstrated by several previous studies that the therapeutic alliance is predictive of the therapeutic effects of treatment. This alliance, however, was little studied in juvenile idiopathic arthritis, its connection with the observance or the quality of life has never been evaluated.