Three cases of cerebral infarction were described with special references to the neuropsychological symptoms due to "minor cerebral hemisphere" damage. In each case, low density area relatively restricted to the right posterior parietal region, involving angular gyrus and its closely surrounding regions, was disclosed on CT scan. Visual disorientation, unilateral visual spatial agnosia, visual constructonal disability caused by hemineglect, and hemiasomatognosia were the neuropsychological symptoms noted in these three cases. The author discussed these symptoms and suggested that the observations of these cases seemed to support the generally accepted hypothesis, that the lesions of the right cerebral hemisphere, localized to the posterior parietal region were responsible for the development of most of the symptoms of so called the syndrome of "minor hemisphere" damage. These neuropsychological symptoms were slight and / or transitory in these three cases. It is likely that the more widespread lesions are necessary for the development of severe and lasting impairment.