Objective:To examine cognitive functions of the patients with cerebral tumor.Methods:31 left cerebral hemisphere tumor patients,34 right cerebral hemisphere tumor patients,and matched healthy controls were assessed on the Cognitive Laterality Battery (CLB).Results:(1) Compared with the control group,results of the left cerebral tumor patients on 4 Sequential-Verbal Abilities were significantly lower (P＜0.05),but there was no significant difference in Visuospatial functioning (P＞0.05).The Cognitive Laterality Quotient(CLQ) of this experimental group was positive,suggesting that the patients' information production abilities of right hemisphere was not impaired.(2)Compared with the control group,results of the right cerebral tumor patients on the 4 Visuospatial Abilities were significantly lower(P＜0.05) The test result of serial sounds of the 4 Sequential-Verbal Abilities was also significantly lower than the control group (P＜0.05).The CLQ of this experimental group was negative,suggesting that patients' information production abilities involving the left hemisphere was normal.Conclusion:CLB is a valid test that could be used to assess the cognitive functioning of cerebral tumor patients.