This is another contribution to the published case material on juvenile schizophrenia. The patient is characterized by a profound withdrawal of interest from the environment, with severe disturbances in speech, motility and affect. There is more evidence for the operation of the parental environment as the significant etiological factor than for the usually adduced hereditary stigmatization. The discussion of the clinical findings is based on the previously published views of Bradley, Potter, and Despert, and contributes nothing new.