Aim: Mild cognitive impairment can be considered as an intermediate clinical state between normal cognitive aging and mild dementia. This study intends to compare the results of neurologists' diagnoses with the results of the Montreal Cognitive Assessment Test in patients with complaints of cognitive impairment.

Materials and Methods: In a cross - sectional study, 213 patients whom - with signs of cognitive problems – have reffered to neurology clinic of valiasr Hospital of naja were selected availability and based on the neurologist's diagnosis to cognitive disorder responded the Montreal'  test. The test's results and demographic characteristics using statistical software SPSS indexes such as frequency, mean, standard, and Chi-square test were used for analysis

Results: The findings showed that most of the patients aged 35-39 years. 54% of the patients were male and 46% female. The majority of these people wrer married, the education level was high school diploma, and their language was Turkish. They were mostly except officers and service experience mostly was in the range of 10-14 years. Also in results of Montreal test between in different categories of age, sex, marital status, education level, ethnicity, class and military service were no significant relationship.

Conclusion: In this study, have tried to compare the results of neurologist's diagnostic, and the Montreal test in patients with Cognitive impairment complaint who referring to the clinic. According to this study of the Montreal cognitive assessment is a rapid test in patients admitted to a clinic , where because of large amount of population admitted there is not enough time to perform other diagnostic assessments. Also because the most studied population was military personnels , the results must be generalized with caution. It is recommended to study differnt social populations in future studies.