Abstract- This electronic document is a “live” template. The current study was conducted to examine the influencing factors in parental stress of 2-6 year old children’s mothers. The present study is a descriptive- post hoc study. 350 mothers were selected from 15 kindergartens of 3 are of Tehran through multistage sampling method. They completed Rosenberg’s self-esteem scale, parental bonding questionnaire, parenting stress index, sources of social support scale, maternal efficacy questionnaire and preschool behavior checklist. Stepwise regression analysis showed that maternal self-eficacy, children’s behavioral problems, mothers’s self-esteem, social support and parental bonding, in five steps, could explain 42% of variance in parental stress. Specific psycho- educational interventions on stress management based on these factors would be effective. Keywords- parental stress, parental bonding, social support, parenting self-efficacy, self-esteem, behavioral problems.