The thesis deals with the relations between perceived interparental conflict and fear of intimacy and loneliness of children at the age of 18 and 19. It also deals with the relations between perceived interparental conflict and the quality of relationship with parents. In the theoretical part, perceived interparental conflict was identified from the perspective of three basic theoretical concepts - cognitive-contextual framework, theory of emotional security and specific emotion model. Also the theoretical concepts dealing with the relations between parental discord and parent-child relationship were discussed (spillover hypothesis, compensatory hypothesis). Subsequently, the problem of romantic relationships in late adolescence was identified with an emphasis on attachement with parents. At the end of this part, empirical findings about relation between marital discord and romantic relationship are discussed. In the empirical study the following methods were used: IPPA (The Inventory of Parent and Peer Attachment), CPIC (Childrenā€˜s Perception of Interparental Conflict Scale), UCLA LS (Scale of loneliness) and FIS (Fear of intimacy scale). In the correlation study significant associations between trust, alienation and communication in parent-child relationship with loneliness were found out, in relation to the level of fear of intimacy was found weaker relationship. Subsequently, the significant relationship between the level of perceived threat of parental conflict and alienation in parent-child relationship was found out. Similarly results were found between perceived threat of parental conflict and trust between parents and adolescents. It was also found that fear of intimacy and loneliness were significantly related to the level of perceived threat of marital discord, which is consistent with mentioned theories and findings. The relationship between characteristics of marital discord and loneliness was rather weak and the relationship between characteristics of conflict and the level of fear of intimacy was not statistically significant. It was also proved that security in relationship with parents can work as a mediator of the relation between the perceived threat of interparental conflict and the loneliness. For fear of intimacy, this relationship was not confirmed. The results of this study are compared with presented theories and empirical findings. Furthermore, the limitations of the study are mentioned and in conclusion new topics for another research are suggested.