A fuel injector for an internal combustion engine

A fuel injector (1) for an internal-combustion engine houses in a hollow injector body (2) an injection-control valve (4), the valve body (17) of which delimits, together with the injector body (2), an annular chamber (30) designed to receive a fuel under pressure, and insulated in a fluid-tight way by a seal member (51) carried by the valve body (17) and made of plastic material.