an ink jet print head has plural electrothrmal converting elements for generating energy used to discharge an ink droplet , plural ink discharging ports arranged above the electrothermal converting elements and discharging the ink droplet , plural ink flowing paths respectively communicated with the plural ink discharge ports and internally including the electrothermal converting elements , a substrate for arranging the plural electrothermal converting elements in a columnar shape and having an ink supplying port constructed by a through port which is connected with the ink flowing paths and extends along an arranging direction of the electrothermal converting elements , and a discharging port plate having the ink discharge ports . the ink flowing paths are formed between the substrate and the discharging port plate by junctioning the discharging port plate onto the substrate . the ink jet print head further has a fluid resisting device of the ink flowing paths in which a side of the ink supplying port is opened in the vicinity of a communication portion of the ink flowing paths in an ink supplying port projecting are of the discharging port plate .