It is usual for the infants 6-12 months to show anxiety when they see that their mothers are temporarily going away. This kind of anxiety has to do with the universal fear that stems from the unaware association of the child of leaving of their “safe protector” and the risk to survive without her help.However, infants grow and their affective bonds with other people are increased, it is expected that their separation anxiety disorder should be reduced. In the preschool years specifically, children although still dependent from their mothers, they tend to direct their attention to the world outside their family and peers (Mental Health Service– USA).Why some preschoolers (and children of primary school refuse constantly to dissociate even for a moment from their mothers and unlike their peers, they tend to weep, to be nervous, to flush or sweat and behave so different when their mother leaves their kindergarten. How harmful is this situation for their health and their future development? There are precisely these questions and others like them that stirred up my mind, so I began to practice in kindergarten. Methodology: In this study were included the preschool children who attend regularly the programs of the kindergartens according to the respective groups. For the data collection there were used questionnaires that brought information about behaviors of the children about their emotional states, by experiencing the situation away from the family members of the data about them.