We report two cases of a previously unrecognized clinical entity: concurrent adenoviral and herpetic ocular infection. The first case was recognized clinically by the presence of herpetic keratitis and findings attributable to epidemic keratoconjunctivitis (EKC) including lid swelling, pseudomembranous and follicular conjunctivitis, subconjunctival hemorrhages, preauricular lymphadenopathy, and corneal infiltrates. Only Herpes simplex virus was recovered by culture. In the second case of apparent EKC (again initially only Herpes simplex was isolated) after maintaining virus cultures long enough to isolate adenovirus, the diagnosis of concurrent infection was established when the second virus was isolated.