A liquid administration device includes an operation unit； a structure that includes an accommodation body configured to accommodate the liquid therein and a needle tube communicatable with the inside of the accommodation body； a cover member that is movable between a protection position and an exposure position； a biasing member that biases the cover member in a distal direction； an exposure restriction unit configured to restrict movement of the cover member to the exposure position when a movement amount of the cover member with respect to the structure reaches a predetermined exposure restriction operation amount； and a movement amount restriction unit.
