Permanent magnet embedded motor and pump device

A permanent magnet embedded motor, comprising:

• a stator of an annular shape;
• and
• a rotor, arranged inside the stator, comprising a rotor core and permanent magnets, and rotating about a predetermined axis, the rotor core comprising insertion holes arranged in a circumferential direction and filling parts provided adjacent to the insertion holes respectively for filling with an adhesive, each of the permanent magnets being inserted into the corresponding insertion hole, wherein
• each of the insertion holes comprises a wall surface to which the permanent magnet adheres;
• and
• at one opening end of the insertion hole, the corresponding filling part is of a shape obtained by cutout in a stepped-down manner in an inner edge area of the insertion hole corresponding to the wall surface.