To provide a filling device preventing the lowering of the viscosity of fluid to be filled, enabling the favorable draining of fluid at a discharge port and securing the easiness of disassembling and cleaning by a simple device configuration.

A filling device 100 for filling fluid in a container includes a cylindrical nozzle 12 extending linearly, a tank 42 and a pump 46. A discharge port 16 for discharging the fluid to be filled is installed at one end of the cylindrical nozzle 12. The tank 42 stores the fluid. The pump 46 pushes out and supplies the fluid from the tank 42 through a connection part 44 to the cylindrical nozzle 12. A head 20 supported by a head support shaft 22 is located near the discharge port 16 of the cylindrical nozzle 12. A drive mechanism 60 is located on a lateral side of the cylindrical nozzle 12, and vertically moves the head support shaft 22 in the cylindrical nozzle 12 so as to bring about a first state that the head 20 closes the discharge port 16 and a second state that the head 20 opens the discharge port 16.