The aim of the study was to analyse an individual psychosocial development and personality of adolescents in relation to family dysfunction. 36 patients who committed suicide attempt treated at the Department of Clinical Toxicology Jagiellonian University Medical College in 2004 and 2005 were included. The Adjective Check List (ACL) by H.G. Gough and A.B. Heilbrun was used. The parents of each of the adolescents were interviewed and responded to questions according to special author's designed Questionnaire. Some phenomenon who can influence the personality and may be recognised as a predictors of suicide attempt were found in most of the examined patients. Prophylactic and therapeutic programs for individual patient and his family member should be constructed.