To suppress both upsizing in the horizontal direction of a head and clogging of a filter caused by foreign substances in a wide range.

The head 1 includes: a filter unit 2 connected with a main tank or the like and provided with a filter 2f in an inner flow path space; a reservoir unit 3 having a reservoir 33x storing ink; and a flow path unit 4 into which the ink is fed from the reservoir unit 3 and on the undersurface of which a number of delivering openings are formed. The flow path space in the filter unit 2 has first and second chambers 21 and 22 formed so as to be provided in parallel in the horizontal direction by placing a partitioning plate 23 stood in the vertical direction between them. The filter 2f is fixed on the partitioning plate 23 so as to be stood in the vertical direction along a plate face of the partitioning plate 23.