Divided structure of a long plastic component for a vehicle

A divided structure of a long plastic component for a vehicle, in which a plurality of constituent parts making up the long plastic component are combined together into one long piece and mounted on a vehicle body, and edge portions of exterior surfaces of the constituent parts being butt-joined with each other in a longitudinal direction of the long plastic component, the constituent parts comprising:

• a first constituent part to be mounted on the vehicle body;
• and
• a second constituent part to be mounted on the first constituent part in such a manner as to overlap with the first constituent part from an outward direction of the vehicle body, substantially perpendicular to a longitudinal direction of the long plastic component,
• wherein the first constituent part and the second constituent part, which have been joined together, are mounted on the vehicle body, and
• wherein the long plastic component comprises a sill garnish.