Abstract: The present invention provides a side body structure of a vehicle having a door-opening which is opened and closed by doors, wherein an annular door-opening member is provided along said door-opening, the annular door-opening member being formed in closed cross sectional shape by a side outer panel and a side inner panel jointed to inside of the side outer panel, and wherein said door-opening member is provided with an annular reinforcement which integrally and continuously extends in an annular manner along the door opening, thereby enhancing the body rigidity of the vehicle regardless of the size of the door-opening in a vehicle having a side body with a free-style type of doors.

Abstract: A vehicle body structure, in which seats are placed side by side above an engine mounted across a floor of a vehicle compartment, has a hole for an access to the engine. A seat mount platform, disposed above the access hole, is interconnected by a hinge mechanism foldable along a fold line so as to be turned up and down about the fold line, thereby opening and closing the access hole.