To provide a method for manufacturing an interior part with decorative stitching, which allows for molding of a surface skin including a decorative stitching part and adhesion of a base material at the same time while maintaining the appearance of the decorative stitching part with good design; and an interior part with decorative stitching.

The method for manufacturing an interior part 1 with decorative stitching allows for molding of a surface skin material 3 with a vacuum molding die 5 and adhesion of the surface skin material 3 to the surface of a base material 4 at the same time. The vacuum molding die 5 having a concave groove 521 for inserting a thread 2 for decorative stitching into a die surface 522 for forming the surface skin material 3 includes an insert 53 for tucking the thread 2 inserted in the concave groove 521 into the surface skin material 3. While the surface skin material 3 adheres to the base material 4 with the vacuum molding die 5 in a closed state, the insert 53 is moved such that the thread 2 inserted in the concave groove 521 is tucked into the interior of the surface skin material 3 by a protrusion 531.