The main research objective of this study was seeking the predictive role of general self-esteem and the body image in social competences among women and their biological daughters. As it stands, there is a lack of research showing the mothers and their adult daughters at the same time in the context of measuring the same psychological variables, i.e., general self-esteem, self-assessment of the body and specific social competences in the scope of behaviour in intimate situations, situations requiring social exposure and assertiveness. The study group comprised 102 individuals; 51 pairs of mothers (40–64 years old, M = 51.33) and their biological daughters (19–25 years old, M = 22.49). The following instruments were used: The Rosenberg Self-esteem Scale, the Contour Drawing Rating Scale, the Body Esteem Scale, the Social Competence Scale, categorized interview (to measure BMI and collect data describing the criteria for selection to the research group). The significance of the differences and the stepwise regression analysis were performed. The results of the study demonstrated the following to be significant predictors of social competences in subjects: General self-esteem B = 0.615, discrepancy real-obligatory body image B = 0.275 among daughters, and physical condition B = 0.362 in mothers. The general self-esteem of daughters positively influences all verified types of their social competences (competences in intimate situations, in case of social exposure and ability to be assertive). However, it is the significant predictor only for mothers’ competences in dealing with situations of social exposure. Discrepancy real-obligatory body image: Seems to be the predictor of daughters’ social competences conditioning effectiveness in situations requiring assertiveness. The physical condition among mothers seems to be especially important for their assertiveness and effectiveness in intimate situations. The conflict between the real and the ideal body image is also an important aspect in predicting the assertiveness in the group of mothers. The study results can prove to be helpful in creating preventive and educational programs focused on self-esteem and social competencies in women, including the context of the relation between mothers and their daughters.