How do parenting concepts vary within and between the families? The present study regards parenting as a complex family process by considering three concepts of parenting: styles, differential treatment and coparenting consistency. A main question was addressed: whether and how these parenting concepts vary within the families towards siblings or between the two parents, and between the families according to the child's, the parent's and the family's characteristics? The parenting concepts were computed from the EPEP questionnaire (Meunier & Roskam, 2007) in a sample of 101 non-divorced families: 101 mothers and 101 fathers of two siblings from 6- to 12-years-old. The parenting concepts were found to vary within the families towards two siblings and between the mother and the father. They were also found to vary between the families according to the child's age and personality traits as well as a function of the parent's educational level and the number of siblings. (Contains 4 tables.)