A liquid administration device includes: a cylindrically-shaped cylindrical body configured to be filled with liquid in its inside a needle tube configured to be provided being communicated or communicable with the cylindrical body at the tip side of the cylindrical body, and to have a sharp needle tip at the tip a gasket configured to be capable of sliding 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 cover member configured to be capable of moving to a first position, in which at least the needle tip of the needle tube is covered, to a second position, moved from the first position to the base end direction, in which the needle tip is exposed, and to a third position, moved from the second position to the tip direction, in which at least the needle tip is re-covered and a restricting member configured to take a state where the cover member is allowed to move from the first position to the second position, and to take a state where moving back of the cover member to the second position is restricted after the cover member has moved from the second position to the third position.
