Introduction: Sleep disorders are common in neurological patients and they can disturb recovering processes, and may also affect neurologic diseases by worsing some important general healthy issues, such as blood pressure, glycemia etc. The aim of this study was using questionnaires, to assess sleep disorders in neurological patients. Materials and methods: The study sample included 40 patients which were divided into 4 groups by 10 patients each, according to their diagnosis: patients with primary headache (PH), patients with mood disorders (MD), patients with lombar pain (LP) and patients after stroke (St). Participants' sleep quality, breathing sleep disorders, sleepiness and insomnia levels were assessed using questionnaires: Pittsburgh sleep quality index (PSQI), Insomnia Severity Index (ISI), Berlin questionnaire (BQ), Epworth Sleepiness Scale (ESS)). Results: According to the PSQI, poor sleep quality was in all 4 groups, BQ was high positive for MD patients and low positive for other 3 groups; the ESS revealed normal data for all participants. According to ISI, patients with PH and MD presented clinical insomnia (moderate severity), patients with LP and St had subthreshold insomnia. Conclusions: According to the results of our study, patients with neurological diseases have low quality of sleep, have high riscs for developing sleep breathing disorders and insomnia. So, sleep disorders are frequent comorbidities which worsen patients´ health. Thus, correct management of sleep disorders can improve outcome of neurological diseases. Acknowledgements: This research has been executed within the Institute of Neurology and Neurosurgery, Chisinau, MD. We thank all the participants involved in the study.