<p>A fuel injection valve has an injector body (4z) and a fuel pressure sensor (50z). The injector body (4z) has formed in it high-pressure paths (6bz, 6cz) for allowing high-pressure fuel to flow to a nozzle and receives a piezo actuator (2z)(opening/closing mechanism), a back pressure control mechanism (3z)(opening/closing mechanism), and other elements for opening and closing the nozzle. The fuel pressure sensor (50z) is mounted on the body (4z) and detects the pressure of the high-pressure fuel. In the body (4z) is formed a branch path (6ez) branched from the high-pressure paths (6bz, 6cz) and introducing the high-pressure fuel into the fuel pressure sensor (50z).</p>
