The research investigates how parental socioeconomic background (level of education, financial situation, labor market activity and the type of settlement) affects the preschooler’s coping skills in social conflicts. The focus is on the most effective coping strategies in kindergarten: negotiation and seeking help from an adult and the inadaptive one: physical aggression. We obtained measures on Coping Mechanism Questionnaire both from the teachers and children, and 306 parents answered the questionnaire about home environment. Regression analyses was applied to find out if there are independent variables with an explanatory role. According to our findings, SES has its relevance in the development of social coping mechanisms. Educational achievement and the activity of parents on the labour-market have been proved to have a moderator role in formation of coping skills among other demographic and psychosocial factors. Children with a more favorable social background cope more effectively.