Sixty children and adolescents, aged 5-17 years, with endogenous psychiatric disorders comorbid with suicidal behavior have been studied. The following disorders have been diagnosed: schizophrenia (51 patients), affective disorders (8), schizotypal personality disorder (1). Four variants of development of suicidal behavior have been singled out: psychopathic-like (25 children), depressive (21), neurotic-like (obsessive) (9) and delusional (psychotic) (5). They have distinct clinical features that confer information about suicidal risk, allow to differentiate therapeutic tactics and indicate a role of psychogeny and psychotic disorders in the development of external forms of suicidal behavior.