Patients with cognitive dysfunction caused by dysmnesia face difficulties in memorizing and learning general concepts; therefore, they encounter trouble in taking medications. Recently, a prescription notebook has been shown to be useful for patients receiving pharmacotherapy; however, it is not yet clear whether a common prescription notebook is useful for patients with a memory disorder. In our study, using a questionnaire for 61 patients, we first determined the benefits of and improvement in the drug administration guidance provided by a pharmacist to patients with a memory disorder compared with those undergoing medical examination by a doctor. Although 35-74% of patients could not communicate with a pharmacist or doctor, most found it easier to communicate with a pharmacist than with a doctor. Moreover, we investigated whether a common prescription notebook and our designed notebook, called the personal notebook, were useful to patients with a memory disorder. Although 89% of patients with a memory disorder use a common prescription notebook, 41% of them answered that they found it difficult to use. On the other hand, 66% of the patients with a memory disorder answered that they wished to use the personal notebook. Remarkably, all patients within 5 years of onset of a memory disorder wished to use this notebook. These findings indicate that it is useful for patients within 5 years of onset of a memory disorder to use the personal notebook. We propose a method to improve the use of a prescription notebook for patients with a memory disorder through this survey.