Mucormycosis, often referred to as black fungus is being recognized as post treatment complication in COVID-19. A complex interaction of immune compromised state may lead to secondary fungal infections. Rhino-orbital mucormycosis, a rare fungal disease, involves the orbit, nose, and sinuses. If not intervened early it might progress with a fatal outcome. The present case report is a Rhino-orbital mucormycosis presentating as a secondary infection in COVID-19 patient and its management. A 51-year-old male patient diagnosed with COVID-19, developed periorbital odema of the left eye along with tooth pain. Nasal endoscopy, computed tomography, and Magnetic Resonance Imaging suggested Rhino-orbital mucormycosis. Surgical debridement followed by intravenous Amphotericin B was prescribed. After a week of follow-up, complete resolution of symptoms was noticed. An early diagnosis and prompt management is the key to reduce morbidity and mortality in these patients. Prophylactic measures and judicious use of drugs may reduce the incidence of this opportunistic infection.