Coronavirus disease 19 (COVID-19) is an infectious disease and is currently a global pandemic. The disease presents mainly with respiratory symptoms, but a broad spectrum of extrapulmonary complications have also been reported in the cardiovascular, gastrointestinal, and nervous systems. Peripheral nerve injury associated with COVID-19 infections can be caused by direct viral invasion or secondary immune response to neural tissue with the same receptors as alveoli, but its clinical course is poorly understood. Anterior interosseous nerve syndrome is a pure motor neuropathy that causes paralysis of the flexor pollicis longus, the flexor digitorum profundus of the index finger, and the pronator quadratus muscles. The cause of this syndrome is not clearly understood, but may be related to viral infection, autoimmune response, or vaccination. This paper reported a case of partial recovery with conservative treatment in acute anterior interosseous nerve syndrome following COVID-19 infection.