To reduce noise and vibration, enable stable loading of an armature and a pump rotor, and provide an electric fuel pump with long service life by providing an armature so that only one end of the armature can be pivotally supported rotatably and the other end can be floated freely while a motor is running.

A pump disposed in a fuel tank in order to feed pressurized liquid fuel into an automobile engine comprises a turbine pump 12 driven by a motor 14 and an end cap housing 16 stored in an annular case 18. The motor 14 stores an armature 20 in a stator 22 having a cylindrical flux cylinder 24 and a permanent magnet 26, and the pump 12 comprises an impeller 38 surrounded by an annular groove 40 formed of a ring 48 and a pump housing 42. Then, a drive shaft 72 of the armature 20 is passed through an outlet cap 46 of the pump 12, fitted rotatably to a shaft bore 94 or a bearing, and cantilevered.