Suicide is the third cause of death at the age group 10–19 in the world. There are inter multiple risk factors of suicidal behaviours. In the case of children of alcoholics the increased number of suicide attempts is explained by genetic predisposition and accumulation of environmental risk factors. The aim of this study is to check whether parental alcoholism is associated with the number and repetition of suicide attempts and the age at which the first suicide attempt occurred among hospitalized psychiatric adolescents. Material and methods: A retrospective analysis – based on medical documentation – of 119 patients aged 13–18, treated during 2013–2014 at the Department of Adolescent Psychiatry in Łódź for: schizophrenia, schizotypal and delusional disorders, mood disorders, neurotic, stress-related and somatoform disorders, behavioural and emotional disorders according to ICD-10. The exclusion criteria were other psychiatric diagnoses, incomplete family history and lack of information about intended self-harm behaviours. The patients were selected at random. The number and repetition of suicide attempts, the age at which the first suicide attempt occurred, parental alcoholism and family history of suicidal behaviours were examined. Analyses were carried out using Statistica 9.1. Results: Parental alcoholism did not statistically significantly affect (p > 0.05) the prevalence or repetition of suicide attempts among psychiatrically treated adolescents. The first suicide attempts were not made by adolescents – also considering the gender, diagnosis, and familial suicidal behaviours. Conclusions: In almost half of the examined psychiatrically hospitalized adolescents at least one parent met the parental alcoholism criteria. Suicide attempts occurred in over 50% of the examined patients, with somewhat higher incidence in girls whose parents met the parental alcoholism criteria, as compared to those without parental alcoholism history. No significant correlation was found between parental alcoholism and the incidence of offspring’s suicide attempts, repetition of suicide attempts, and the age at which suicide attempt is made. The research on the correlation between the prevalence of suicide attempts among psychiatrically treated adolescents and parental alcoholism should also involve appraisal of the family functioning.