A method for manufacturing a dynamoelectric stator, said stator comprising: a cylindrical stator core (2, 11, 21) in which slots (2a, 11a, 21a) are arranged in a circumferential direction so as to open onto a radially-inner side; and a stator winding (3, 22, 31) mounted to said stator core (2, 11, 21), a coil end (3f, 3r, 22f, 22r, 31f, 31r) of said stator winding (3, 11, 31) being impregnated with a varnish, wherein said method for manufacturing a dynamoelectric stator (5, 15, 25) comprises: a varnish treatment process comprising: a preheating step in which said stator (5, 15, 25) is preheated; a varnish application step in which said varnish is dripped onto said coil end (3f, 3r, 22f, 22r, 31f, 31r) from radially outside said stator (5, 15, 25) while rotating said preheated stator around its central axis, wherein a rotational speed of said stator (5, 15, 25) in said varnish application step is set so as to be between 5 and 50 rpm; and a varnish heat hardening step in which said varnish is hardened by heating said stator (5, 15, 25) to which said varnish has been applied,; characterized in that said varnish is constructed by THEIC-denatured polyester containing an unsaturated polyester resin, trihydroxyethyl isocyanurate and 2-hydroxyethyl methacrylate; said varnish is adjusted so as to have a viscosity of 9,000 mPa·s at room temperature, a viscosity of 22 mPa·s at 100 degrees Celsius and a viscosity of 16 to 105 mPa·s at a temperature of said stator during varnish application; and said stator (5, 15, 25) is rotated around said central axis for a predetermined amount of time at least initially in said varnish heat hardening step. a cylindrical stator core (2, 11, 21) in which slots (2a, 11a, 21a) are arranged in a circumferential direction so as to open onto a radially-inner side; and a stator winding (3, 22, 31) mounted to said stator core (2, 11, 21), a coil end (3f, 3r, 22f, 22r, 31f, 31r) of said stator winding (3, 11, 31) being impregnated with a varnish, wherein said method for manufacturing a dynamoelectric stator (5, 15, 25) comprises: a varnish treatment process comprising: a preheating step in which said stator (5, 15, 25) is preheated; a varnish application step in which said varnish is dripped onto said coil end (3f, 3r, 22f, 22r, 31f, 31r) from radially outside said stator (5, 15, 25) while rotating said preheated stator around its central axis, wherein a rotational speed of said stator (5, 15, 25) in said varnish application step is set so as to be between 5 and 50 rpm; and a varnish heat hardening step in which said varnish is hardened by heating said stator (5, 15, 25) to which said varnish has been applied,; a varnish treatment process comprising: a preheating step in which said stator (5, 15, 25) is preheated; a varnish application step in which said varnish is dripped onto said coil end (3f, 3r, 22f, 22r, 31f, 31r) from radially outside said stator (5, 15, 25) while rotating said preheated stator around its central axis, wherein a rotational speed of said stator (5, 15, 25) in said varnish application step is set so as to be between 5 and 50 rpm; and a varnish heat hardening step in which said varnish is hardened by heating said stator (5, 15, 25) to a preheating step in which said stator (5, 15, 25) is preheated; a varnish application step in which said varnish is dripped onto said coil end (3f, 3r, 22f, 22r, 31f, 31r) from radially outside said stator (5, 15, 25) while rotating said preheated stator around its central axis, wherein a rotational speed of said stator (5, 15, 25) in said varnish application step is set so as to be between 5 and 50 rpm; and a varnish heat hardening step in which said varnish is hardened by heating said stator (5, 15, 25) to which said varnish has been applied,;