Upper rail structure of vehicle

The present disclosure relates to a vehicle body integrated upper rail structure provided on an underside of a door opening portion formed in a vehicle body and including: a rail portion including a rail opening providing a sliding path of a door and formed in a longitudinal direction of the vehicle body; a pillar connection portion extending from the rail portion to a lower side of the vehicle body and connected to the pillar; and a roof rail connection portion extending from an upper end portion of the rail portion toward a center portion of the vehicle body and connected to a roof rail of the vehicle body. 本公开涉及一种车身一体式上导轨结构，该车身一体式上导轨结构设置在车身中形成的车门开口部的下侧并包括：导轨部，包括提供车门的滑动路径并沿车身的纵向形成的导轨开口；支柱连接部，从导轨部向车身的下侧延伸，并连接到支柱；以及车顶导轨连接部，从导轨部的上端部向车身的中心部延伸，并连接到车身的车顶导轨。