a method for forming an ink jet recording head includes at least a step of forming an ink flow path pattern on a substrate by a photodecomposable positive type resist resin , a step of , once executing each of the steps of applying , exposing and baking thereon a nozzle - constituting resin layer which is a negative type resist containing an optical cation polymerization starting agent and having an epoxy resin as a chief component with respect to each of an ink flow path pattern and an ink discharge port pattern , collectively developing unexposed portions on the respective nozzle - constituting resin layers , and a step of removing the formed photodecomposable resin is minimized .