Method of manufacturing head unit

A method of manufacturing a head unit, comprising:

• an ink-jet head forming step in which an ink-jet head having an ink passage extending from an ink supply port to a nozzle which ejects ink is formed by putting in layers a plurality of plates which includes a nozzle plate having an ink ejection face on which the nozzle is opened and a fixed plate to be fixed to a frame, the fixed plate having both ends thereof not being in contact with the other plates;
• an adhesive layer forming step in which an adhesive layer is formed on the frame;
• a placing step in which the frame and the ink-jet head are placed on a first jig having a first face and a second face which is parallel to the first face and located outside the first face when seen in a direction perpendicular to the first face while being at a predetermined distance from the first face with respect to the direction perpendicular to the first face, in such a manner that a portion of the frame other than a portion formed with the adhesive layer is in contact with the second face, that the ink ejection face is opposed to the first face, and that the both ends of the fixed plate are in contact with the adhesive layer;
• and
• an adhesive layer curing step in which the adhesive layer is cured after the placing step, under a state where the ink ejection face is in contact with the first face.