The purpose of this research was to develop a structural model for predicting academic achievement based on parenting styles and parent-child relationship among high school students. The statistical population of the study was comprised of all male and female 10th and 11th graders in Tehran in school year 2016-17 (123240 students). To draw the sample, random multi-stage cluster sampling method was utilized and 400 students (220 girls and 180 boys) were selected based on Morgan’ s formula. The instruments included Parental Authority Questionnaire (Baumrind, 1973) and the Parent-Child Relationship Survey (Fine et al., 1983). The results indicated that authoritative parenting style had a significant, positive effect on students’ academic achievement. Authoritarian parenting style had a significant, negative effect on academic performance, while indulgent parenting style had a non-significant, negative impact on academic achievement. As to dimensions of mother-child relationship, positive correlations were observed between positive affect, communication, identification and students’ academic achievement, whereas resentment/role confusion had a significant, negative association with academic performance. With regard to components of father-child relationship, communication, positive affect, and interaction had significant, positive associations with academic achievement, while father's anger was negatively associated with academic performance.