To eliminate the clogging due to a dry-solidification of a content remaining in the leading end nozzle after a filling operation for a liquid filling nozzle device.

This liquid filling nozzle device is equipped with an external cylinder 1 being equipped with a leading end nozzle 2 at the lower end, and a filler content feeding port 6 at an upper part, a movable shaft 11 which is fitted in the external cylinder 1 and is slidably movable by an actuator 18 being attached to the top of the external cylinder in the vertical direction, a movable valve 15 which is attached at the lower end part 13 of the movable shaft 11 slidably in the longitudinal direction of the movable shaft 11, and is urged downward in the longitudinal direction, and comes into contact with the upper internal surface of the leading end nozzle 2, and a cylindrical valve seat 14 which can be tightly joined to the peripheral surface of the movable valve 15. Then, blow air (a) which is fed through an air passage 12 which goes through the inside of the movable shaft 11 from the upper end to the lower end 13, is jetted from the leading end nozzle 2.