Numerous critics have studied Jonathan Swift's use of animals as satirical tools in Gulliver's Travels. However, none has devoted sufficient attention to Swift's forerunning “ecocritical“ concern with animal issues in relation to humans. Although the animal theme in Gulliver's Travels does involve satirical intentions, this paper aims at showing that it has more profound implications that manifest Swift's forward-looking ideas regarding the relation between humans and their natural environment, as represented in the human-animal relationship. The ethical stand and moral commitment to the natural world represented by animals, and the care for making the themes of a literary work a means to create connections between man and the natural environment around him, are basic ecocritical values that Swift stresses both explicitly and implicitly throughout the novel.