Background: Behavioral problems among preschool children are a global problem of significant public importance that adversely affects on children's social and emotional challenges throughout their lifetime. Aim of the study:was to assess the common behavioral problems among the preschool children as perceived by theirteachers.Subjects& Methods:Research design:A descriptive analytical design was used. Setting: four Nursery Schools and kindergartens in Zagazig city where selected randomly. Subjects: preschool children (170)and their teachers who coped with them. Tools of data collection:Two tools were used for collecting data in the study; the first tool was an interviewquestionnaire for children's caregivers as (parents). The second tool was Teacher Report Form which used to determine behavioral problems among preschool children.Results: Results revealed that more than one fifth (20.6%) of the studied children hadexternalizing behavioral problems while internalizing behavioral problems were less common (8.20%). Anxiety / depression and aggressive behaviors followed by attention problems and withdrawn behaviors were the most common behavioral problems among preschool children.Conclusion:behavior problems among preschool children are a problem encountered in nursery schools and kindergartens.Recommendations:Early screening system for behavioral problems among preschool children should be done in kindergartens and nursery schools.