Introduction: Multiple Sclerosis Knowledge Questionnaire (MSKQ) is a self-administered inventory assessing patients’ knowledge about Multiple Sclerosis. In this study, we aimed to test the reliability and validity of MSKQ in Turkish patients. Methods: Patients with Multiple Sclerosis who attended an education seminar in our university hospital were enrolled in the study. Results: Fifty-eight patients completed and returned the questionnaire twice, before and after the seminar. Mean number of items that were answered correctly in the first round was 12.8 (5.2), which increased to 18.7 (3.2) in the second round after the seminar. This increase was found to be significant (p<0.01). Conclusion: Questions regarding general characteristics of the disease were found to be answered correctly more often than those questions regarding diagnostic and treatment options. This finding indicates that patients may be more interested in the general characteristics of the disease and in the factors that may have started the disease process. Higher number of incorrect answers regarding diagnostic and treatment strategies may be caused by a lack of interest on the part of the patient who may perceive these subjects to be too complex or who may choose to leave decision-making to healthcare professionals. Also, physicians may be unable to inform patients in these areas because of a lack of time or resources. New molecules developed for the treatment of Multiple Sclerosis makes it even more difficult for patients to follow and form their own opinions about the treatment process. These results show us that patient education is essential and our patients need more educational resources, especially regarding treatment options. The significant increase in the number of correct answers after the education seminar supports the need for broader patient education (p<0.01). Turkish version of MSKQ is a reliable and valid measure for assessing patients’ level of knowledge.