Eleutherodactylus inoptatus (common name: Diquini robber frog) is a species of frog in the family Eleutherodactylidae endemic to Hispaniola; it is found both in Haiti and the Dominican Republic. With female snout–vent length of about , it is the largest eleutherodactylid frog. Eleutherodactylus inoptatus is a common frog found in mesic hardwood forest. It can also live in coffee and banana plantations as long as there are trees and shade. It is impacted by habitat loss. References inoptatus Endemic fauna of Hispaniola Amphibians of the Dominican Republic Frogs of Haiti Amphibians described in 1914 Taxonomy articles created by Polbot Taxa named by Thomas Barbour