Apparatus and method of filing microscopic powder

A powder filling apparatus comprises: a first container (10) configured to contain a powder;a weighing tank (30) configured to receive the powder from the first container and discharge a predetermined amount of the powder to a second container (40), comprising: an opening (31) configured to discharge the powder into the second container; anda regulator (32) configured to open and close the opening to discharge a predetermined amount of the powder into the second container;a connector (20) configured to feed the powder from the first container into the weighing tank; anda support configured to support the second container, comprising: a filled powder weighing device (60) configured to control a weight of the powder container; andan inner air remover (38) configured to remove air from the powder contained in the second container, anda funnel (2) comprising a powder discharge portion which is capable of fitting an opening of the second container with substantially no space therebetween and through which the powder is discharged from the weighing tank to the second container,    wherein the opening of the weighing tank comprises a powder supply and stop device.