To provide a filling device capable of preventing liquid from being dripped in the case of intermittently filling a relatively large amount of a liquid material packaged in an automatic filling machine, thereby improving work efficiency with increased bag-making speed and eliminating an anxiety about wrinkles generated in a packaging film when filling.

The automatic filling device is characterized in that a filling nozzle 10 is formed into an inverted L-shaped as a whole and composed of a horizontal tube 11 having a connection part 101 to a supply pipe 15 of the liquid material which is packaged at its base end and an insertion part 12 toward a bag body continuing from the horizontal tube 11 and bent downward, the horizontal tube 11 is branched into at least three small-diameter tubes, and the insertion part 12 is collectively configured so that the branching small-diameter tubes may be aligned with respect to each other in a row toward an axial direction of the horizontal tube 11.