To provide a discharging liquid that can form a joining film patterned in a fine shape at a low cost for joining two base materials with each other, a formation method of the joining film patterned in a fine shape using the discharging liquid, a joining method for joining via the joining film formed by the formation method of the joining film, and a joined item equipped with the joining film joined by the joining method.

The discharging liquid comprises a metal atom and a leaving group constituted of an organic component and is used for obtaining a joining film 3 patterned in a predetermined shape developing adhesion to another adherend near the surface by application of energy, is used for obtaining the joining film 3 patterned in the predetermined shape by applying the discharging liquid, using a liquid droplet discharging method, on a substrate (base material) 2 correspondingly to the predetermined shape followed by drying-baking, and comprises a metal complex of the metal atom and a solvent or a dispersant for dissolving or dispersing the metal complex.