Objective : The main aim of this study was to investigate the mutual relationship between perceptions of peer relationship quality and position in positive and negative peer networks among young people from late childhood to early adolescence. Method : A cross-lagged panel model of three waves of data was conducted using a large representative sample of Polish students from third grade to sixth grade ( N = 4 673). Results : The results proved a reciprocal relationship between position in positive (Like) and negative (DisLike) peer networks and the perceived quality of peer relationships (PPI). The effect found of position on the perceived quality of peer relationships is in line with the existing state of knowledge. Since previous research has yielded divergent results, this demonstration of the prospective impact of perceived relationship quality on peer network position fills an important cognitive gap. The study also revealed the following : (1) in the first (W1→W2) and second period (W2→W3) the strength of the prospective effects of position in the peer network on its perceived quality (Like→PPI and DisLike→PPI), and the strength of the prospective effects of perceived quality on position (PPI→Like and PPI→DisLike), were not statistically significantly different ; (2) the effect size of the cross-lagged coefficients ranged from small to medium; (3) all constructs showed greater stability in the second period than in the first; (4) in both periods stability of PPI was lower than the stability of sociometric indicators. Conclusion : This research confirms the presence of a self-reinforcing loop: a low position in peer networks→poor perceived quality of relations→decrease of position in peer networks. The findings are discussed in relation to the evolutionary theory of loneliness (ETL), which assumes a potentially active role of the perception of peer relationships in forming a position in a peer network. Practical implications of the results are discussed.