Electric internal gear pump

An electric pump comprises a case in which a core (14) being enwound by a coil (15) is embedded, a permanent magnet (17) (36) (44) formed in a cylindrical shape, having a central axis (B) being identical to that of the core, and positioned so as to face an inner peripheral side of the core (14), an outer rotor (18) (37) (45) fixed to an inner peripheral side of the permanent magnet (17) (36) (44), a rotor unit including the permanent magnet (17) (36) (44) and the outer rotor (18) (37) (45), an inner rotor (20) (39) having a central axis (A), which is eccentric from a central axis (B) of the core (14), so as to rotate; and an inscribed-type pump for carrying out, by means of rotation of the inner rotor (20) (39), which is engaged with the outer rotor (18) (37) (45) so as to rotate in accordance with rotation of the outer rotor (18) (37) (45), intake and exhaust of fluids, characterized in that the rotor unit includes a slide surface (16a) (16b) (35a) (45a) extending in an axial direction; the case includes a convex portion (12a) (32a) (42a) (11c) having an identical central axis (B) to that of the core, and the rotor unit is rotatably supported by the peripheral surface of the convex portion (12a) (32a) (42a) (11c) at the slide surface (16a) (16b) (35a) (45a).