A filtering apparatus for fluid withdrawing and expelling includes a receiving unit having a first chamber, a second chamber, and a first through hole and a second through hole respectively in communication with the first chamber and the second chamber a filter device movably disposed between a first position and a second position to open or close the second through hole of the receiving unit respectively and having a filter screen corresponding to the first through hole and a withdrawing and expelling unit capable of withdrawing or expelling a fluid from the first chamber of the receiving unit.一種液體吸排過濾裝置,包含有一容置單元,具有一第一容室及一第二容室,一第一通孔及一第二通孔均各自連通該第一容室與第二容室;一過濾單元,可移動地於一第一位置及一第二位置,分別打開及封閉該容置單元的第二通孔,該過濾單元具有一濾網對應該第一通孔;以及一吸排單元,係可對該容置單元的第一容室抽排液體。(1)‧‧‧容置單元(4)‧‧‧過濾單元(7)‧‧‧吸排單元(10)‧‧‧筒件(11)‧‧‧第一容室(20)‧‧‧承座(21)‧‧‧第一通孔(22)‧‧‧第二通孔(23)‧‧‧第一止部(30)‧‧‧前通件(31)‧‧‧第二容室(32)‧‧‧第二止部(40)‧‧‧載體(50)‧‧‧濾網(60)‧‧‧固定環
