An inkjet ink capable of forming a polyimide film having, for example, strong mechanical strength, is provided. The inkjet ink contains: a polyamic acid (A) having a weight-average molecular weight of 50,000-500,000; one or more of an amic acid compound (B1) and an amic acid compound (B2), in which the amic acid compound (B1) is prepared from a compound (a3) having two or more anhydride groups and a monoamine (a5), and the amic acid compound (B2) is prepared from a diamine (a4) and a compound (a6) having one anhydride group; and a solvent (C).