A liquid administration device includes a cylindrical body a needle tube configured to communicate or to be communicable with the cylindrical body at a tip side of the cylindrical body a gasket that is slidable within the cylindrical body an operation member configured to perform pressing operation to discharge the liquid from the needle tube by pressing the gasket toward the tip direction a restricting member arranged at an outer peripheral side of the cylindrical body, and configured to be positioned to restrict the pressing operation and a cover member that is movable to a first position, in which at least the needle tip of the needle tube is covered, and to a second position, retreated in a base end direction from the first position, in which the needle tip is exposed.
