An ink jet head

摘要

An ink jet head is provided with an orifice (2) plate having a plurality of discharge ports (1) being open thereto. This ink jet head comprises evaporation suppressing groove (10) in the vicinity of the discharge ports. With the arrangement thus formed, it becomes possible to heighten the humidity in the atmosphere in the vicinity of discharge ports (1), hence suppressing the evaporation from the discharge ports for the prevention of unstable discharges. <IMAGE>