Covid-19 was reported from China for the first time. The most common manifestation of this novel infection is respiratory problems. However, it can also invade both central and peripheral nervous systems. The usual reported symptoms in patients with central nervous system complications were dizziness (16.8%) and headache (13.1%). In patients with peripheral nervous system problems, the most common reported symptoms were taste impairment (5.6%) and smelling impairment (5.1%) due to olfactory nerve involvement. In this case study, we present a 46-year-old male who was referred to our clinic in Shiraz for electrodiagnosis due to paresthesia and numbness of the right 4th and 5th fingers accompanied by weakness and atrophy of the muscles in the ulnar nerve territory, which occurred during Covid-19 infection in this patient. Severe partial involvement of the right ulnar nerve at the elbow was detected in the electrodiagnosis, and findings in the right elbow MRI were in favor of ulnar neuritis.