For schizophrenics and persons at risk of developing schizophrenia,issues regarding the origin of self and paternity sometimes become pressing questions which jeopardize the formation of their subjects.
 We termed the system which gives rise to such questions as a theme of generation.
 Through the analysis of a peculiar delusion in a chronic male case, which included the reverse and alteration of the family relations, we clarified the location of a theme of generation in the psychopathology of schizophrenia.
 The delusion emerged on the death of his parents and successive alienation from his brothers and sisters, which confronted him with a question of generation. The important appearance mechanisms of the delusion were second person hallucinations and primary delusions through delusional ideas.
 Themes of feminization and monogenic reproduction playing a central role in the delusion were sustained by the concept of the female as a container to regulate the infinite chaos, which is characteristic to the delusion of feminization in schizophrenia（Kato, 2002）.
 With reference to the findings of J.Lacan’s structural psychoanalysis,we considered the delusion as a schizophrenic answer to a perplexing question of generation posed to the patient.
 Additionally,we discussed the delusional other as the responder to this question who had the following three characteristics : 1. the other was the place of the infinite production of signifiers,2.the other took the position of a mysterious God-like figure and made the patient’s body the object of “jouissance”, and 3. the other also responded to the question of sexual difference.