A liquid administration tool includes a structure including a tubular body in which liquid is fillable, the tubular body having a bottom portion at a distal end and, an opening portion at a proximal end, and a needle tube positioned at a distal portion of the tubular body, the needle tube having a needle tip at a distal end thereof, and the needle tube being communicable at a proximal end thereof with an inside of the tubular body an operation member having a pusher a cover member a biasing member configured to bias the cover member in the distal direction a locking unit configured to restrict the movement of the cover member and a movement amount restriction unit configured to restrict the movement amount of the cover member.
