an ink jet head includes : a pressure chamber that stores an ink and has an orifice ; a filter plate including a through hole portion and a filter portion , the through hold portion disposed separately from the filter portion with a certain gap ; a supply unit that supplies the ink through the filter portion to the pressure chamber ; and a jetting unit that jets ink droplets through the orifice from the pressure chamber . the filter portion is formed to have a first aperture ratio . at least one through hole is formed on the through hole potion so that the filter portion has a second aperture ratio . the first aperture ratio is smaller than the second aperture ratio .