To provide a rear shelf structure of automobile that can improve the appearance of rear part of compartment and restrain the generation of vibration and noise effectively.

A front reinforcement 12 and a rear reinforcement 13 extending to a car breadth direction, respectively are installed on a front lower side and a rear lower side of a rear shelf panel 11 of an automobile. And also, a retractor housing unit for storing a retractor 16 of seat-belt 15 for rear seat is provided at about center of a breadth direction of the rear shelf panel 11 between the front reinforcement 12 and the rear reinforcement 13.