In the paper, the generation gap conflict phenomenon occurring in families with adolescent children is given thorough psychological and sociological analysis. Attention is drawn to psychological and socio-cultural causes of such confl icts, the stages of their development are determined, constructive and destructive strategies of managing family confl icts are indicated, and four types of tension arising between parents and their adolescent children are characterised in families of three close generations: the End of Century Generation, i. e. the 1989 Generation, the Transformation Period Generation, and the End of Century Stragglers.