The Early intervention program for the first episodes of psychotic disorders (RIPEPP) at the Psychiatric Hospital "Sveti Ivan" in Zagreb encompasses patients hospitalized due to various psychoses (acute psychotic disorder, schizophrenia, schizoaffective and delusional disorder, bipolar affective disorder with psychotic symptoms) in the "critical period" of illness, i.e. within five years after the occurrence of the first symptoms. The RIPEPP Program consists of an in- and out-patient part, and includes psychotherapeutic and psychoeducative components as well as the administration of antipsychotics. The Psychotherapeutic part, conducted by psychotherapists - group analysts, comprises psychodynamic group psychotherapy for patients and for family members. The Psychoeducative part, led by cognitive-behavioral therapists, is carried out through educative interactive workshops for both patients and their family members. The paper describes the theoretical framework, as well as the professional, personnel, educative and organizational basis of the Program, the principles of evaluation and some experiences after five years of implementation.