A powder filling apparatus, comprising: a powder basket configured to include a powder; a powder container configured to contain the powder; and a powder transferer configured to transfer the powder from the powder basket to the powder container, the powder transferer comprising: plural volume changing parts; and plural reciprocating members, each of the reciprocating members corresponding to one of the volume changing parts, and each of the reciprocating members being configured to reciprocate to expand a volume of the corresponding volume changing part to draw a fluid from an upstream side of a transfer direction and compress the volume thereof to transfer the drawn fluid to a downstream side thereof with pressure, characterised by comprising: a drive controller configured to control reciprocation of the reciprocating members such that a time for compressing the volume of each of the volume changing parts is longer than a time for expanding the volume thereof; wherein a flow path at the upstream side of the transfer direction and a flow path at the downstream side of the transfer direction are connected with each other, wherein a total of the time for compressing the volume and the time for expanding the volume is one cyclic time, wherein the one cyclic time is divided by the number of the volume changing parts to determine a phase difference of time, and with which the reciprocating member for each of the volume changing parts reciprocates, and wherein the time for expanding the volume of each the volume changing parts is shorter than the phase difference of time and longer than 1/12 of the one cyclic time. a powder basket configured to include a powder; a powder container configured to contain the powder; and a powder transferer configured to transfer the powder from the powder basket to the powder container, the powder transferer comprising: plural volume changing parts; and plural reciprocating members, each of the reciprocating members corresponding to one of the volume changing parts, and each of the reciprocating members being configured to reciprocate to expand a volume of the corresponding volume changing part to draw a fluid from an upstream side of a transfer direction and compress the volume thereof to transfer the drawn fluid to a downstream side thereof with pressure, characterised by comprising: a drive controller configured to control reciprocation of the reciprocating members such that a time for compressing the volume of each of the volume changing parts is longer than a time for expanding the volume thereof; wherein a flow path at the upstream side of the transfer direction and a flow path at the downstream side of the transfer direction are connected with each other, wherein a total of the time for compressing the volume and the time for expanding the volume is one cyclic time, wherein the one cyclic time is divided by the number of the volume changing parts to determine a phase difference of time, and with which the reciprocating member for each of the volume changing parts reciprocates, and wherein the time for expanding the volume of each the volume changing parts is shorter than the phase difference of time and longer than 1/12 of the one cyclic time. plural volume changing parts; and plural reciprocating members, each of the reciprocating members corresponding to one of the volume changing parts, and each of the reciprocating members being configured to reciprocate to expand a volume of the corresponding volume changing part to draw a fluid from an upstream side of a transfer direction and compress the volume thereof to transfer the drawn fluid to a downstream side thereof with pressure, characterised by comprising: a drive controller configured to control reciprocation of the reciprocating members such that a time for compressing the volume of each of the volume changing parts is longer than a time for expanding the volume thereof; wherein a flow path at the upstream side of the transfer direction and a flow path at the downstream side of the transfer direction are connected with each other, wherein a total of the time for compressing the volume and the time for expanding the volume is one cyclic time, wherein the one cyclic time is divided by the number of the volume changing parts to determine a phase difference of time, and with which the reciprocating member for each of the volume changing parts reciprocates, and wherein the time for expanding the volume of each the volume changing parts is shorter than the phase difference of time and longer than 1/12 of the one cyclic time. a drive controller configured to control reciprocation of the reciprocating members such that a time for compressing the volume of each of the volume changing parts is longer than a time for expanding the volume thereof; wherein a flow path at the upstream side of the transfer direction and a flow path at the downstream side of the transfer direction are connected with each other, wherein a total of the time for compressing the volume and the time for expanding the volume is one cyclic time, wherein the one cyclic time is divided by the number of the volume changing parts to determine a phase difference of time, and with which the reciprocating member for each of the volume changing parts reciprocates, and wherein the time for expanding the volume of each the volume changing parts is shorter than the phase difference of time and longer than 1/12 of the one cyclic time.