An embedded magnet motor (100, 200), comprising: a stator core; a plurality of permanent magnets each having a rectangular cross section; and a rotor core (20, 220) being provided so as to face the stator core, the rotor core (20, 220) being embedded with the permanent magnets; wherein the stator core and the rotor core (20, 220) define a first air gap being positioned at an intermediate portion of the rotor core, the first gap being positioned between the stator core and the rotor core (20, 220); the stator core and the rotor core (20, 220) define a second air gap being positioned at a first portion (20a, 220a) corresponding to a first axis of the rotor core (20, 220), the second air gap being positioned between the stator core and the rotor core (20, 220); the stator core and the rotor core (20, 220) define a third air gap being positioned at a second portion (20b, 220b) corresponding to a second axis of the rotor core (20, 220), the third air gap being positioned between the stator core and the rotor core (20, 220); and on a basis of the first axis being extended in a same direction as a main magnetic flux and the second axis serving as a direction electrically orthogonal to the first axis, because a diameter of the intermediate portion being positioned between the first portion (20a, 220a) and the second portion (20b, 220b) of the rotor core is set smaller than a diameter of the first portion (20a, 220a) and than a diameter of the second portion (20b, 220b), the first air gap is set greater than the second air gap and than the third air gap, wherein the first axis serves as a direction along the diameter of the rotor core (20, 220), the direction that passes through a center of the permanent magnet; the second axis serves as a direction along the diameter of the rotor core (20, 220), the direction that passes through a middle portion of the rotor core, the middle portion being positioned between the permanent magnets that are positioned next to each other; and the stator core includes a plurality of teeth being provided with a wound portion that is wound with a winding wire; and characterized in that the second portion (20b, 220b) includes a third portion corresponding to a magnetic path, the third portion having a width that is positioned along a tangential direction of an outer circumference of the rotor core (20, 220), the width that is equal to or greater than 20 percent and is equal to or less than 32 percent of a width of the wound portion of the teeth of the stator core, the width being positioned along the tangential direction of the outer circumference of the rotor core (20, 220). a stator core; a plurality of permanent magnets each having a rectangular cross section; and a rotor core (20, 220) being provided so as to face the stator core, the rotor core (20, 220) being embedded with the permanent magnets; wherein the stator core and the rotor core (20, 220) define a first air gap being positioned at an intermediate portion of the rotor core, the first gap being positioned between the stator core and the rotor core (20, 220); the stator core and the rotor core (20, 220) define a second air gap being positioned at a first portion (20a, 220a) corresponding to a first axis of the rotor core (20, 220), the second air gap being positioned between the stator core and the rotor core (20, 220); the stator core and the rotor core (20, 220) define a third air gap being positioned at a second portion (20b, 220b) corresponding to a second axis of the rotor core (20, 220), the third air gap being positioned between the stator core and the rotor core (20, 220); and on a basis of the first axis being extended in a same direction as a main magnetic flux and the second axis serving as a direction electrically orthogonal to the first axis, because a diameter of the intermediate portion being positioned between the first portion (20a, 220a) and the second portion (20b, 220b) of the rotor core is set smaller than a diameter of the first portion (20a, 220a) and than a diameter of the second portion (20b, 220b), the first air gap is set greater than the second air gap and than the third air gap, wherein the first axis serves as a direction along the diameter of the rotor core (20, 220), the direction that passes through a center of the permanent magnet; the second axis serves as a direction along the diameter of the rotor core (20, 220), the direction that passes through a middle portion of the rotor core, the middle portion being positioned between the permanent magnets that are positioned next to each other; and the stator core includes a plurality of teeth being provided with a wound portion that is wound with a winding wire; and characterized in that the second portion (20b, 220b) includes a third portion corresponding to a magnetic path, the third portion having a width that is positioned along a tangential direction of an outer circumference of the rotor core (20, 220), the width that is equal to or greater than 20 percent and is equal to or less than 32 percent of a width of the wound portion of the teeth of the stator core, the width being positioned along the tangential direction of the outer circumference of the rotor core (20, 220).