Aim:This study aimed to investigate the association of children’s obesity with parental attachment and psychological variables as impulsivity, self-control and efficiency of eating control. Methods:This cross-sectional study was conducted among 202 obese students aged 9– 13 years selected by multistage cluster sampling from different areas of Isfahan, Iran. Three questionnaires were considered to be answered by the students and one for their parents. The students completed the following questionnaires: (i) Inventory of Parent and Peer Attachment-Revised version for Children (IPPA-R); (ii) Impulsivity Scale (IS); (iii) Efficiency of Eating Control; and (iv) Self-control Rating Scale (SCRS). Results:The quality of children’s attachment had direct effects on self-efficacy of eating management and on obesity by mediating of self-efficacy of eating. Moreover, attachment had direct effect on self-control and impulsivity, and in turn through these psychological variables, it had indirect effects on self-efficacy of eating management. Conclusion:The findings of this study underscore the importance of parent–child attachment quality. It can be suggested that childhood obesity can be prevented and managed with creating a secure attachment bond between children and parents and increasing perceived self-efficacy eating management in children.