The liquid dispensing tool (10) comprises an inner structure (1) having an inner tube (3) capable of filling a liquid therein, a double-headed needle (71), and an outer tube (4), and an operating member performing a pressing operation for discharging the liquid from the double-headed needle 5, a cover member 6 that is movable between a position (A) covering the needlepoints of the double-ended needle 71 and a position (B) where the needlepoint is exposed, a coil spring that urges the cover member 6 in the distal direction 13, when the cover member 6 moves from the position (B) to the position (A) and the amount of movement of the cover member 6 reaches the lockable movement amount, the lock member restricts the movement of the cover member 6 to the position (B) Section 50 and the cover member 6 are positioned at the position (B) and the movement amount of the cover member 6 is restricted so that the movement amount of the cover member 6 does not reach the lockable movement amount until the pressing operation is completed And a regulating section 80.液体投与具10は、内部に液体を充填可能な内筒3と、両頭針71と、外筒4とを備える内側構造体1と、前記液体を両頭針71から吐出させる押圧操作を行なう操作部材5と、両頭針71の針先を覆う位置(A)と、前記針先が露出する位置(B)との間を移動可能なカバー部材6と、カバー部材6を先端方向に付勢するコイルバネ13と、カバー部材6が位置(B)から位置(A)に移動し、カバー部材6の移動量がロック可能移動量に達すると、カバー部材6の位置(B)への移動を規制するロック部50と、カバー部材6が位置(B)に位置し、押圧操作が完了するまで、カバー部材6の移動量がロック可能移動量に達しないようにカバー部材6の移動量を規制する移動量規制部80とを備える。
