An electric pump comprises a case in which a core being enwound by a coil
is embedded, a permanent magnet formed in a cylindrical shape, having a
central axis being identical to that of the core, and positioned so as to
face an inner peripheral side of the core, an outer rotor fixed to an
inner peripheral side of the permanent magnet, a rotor unit including the
permanent magnet and the outer rotor, an inner rotor having a central
axis, which is eccentric from a central axis of the core, so as to
rotate; and an inscribed-type pump for carrying out, by means of rotation
of the inner rotor, which is engaged with the outer rotor so as to rotate
in accordance with rotation of the outer rotor, intake and exhaust of
fluids, wherein the rotor unit includes a slide surface extending in an
axial direction; the case includes a cylindrical projecting ring portion
having an identical central axis to that of the core, and the rotor unit
is rotatably supported by the peripheral surface of the cylindrical
projecting ring portion at the slide surface.