VEHICLE QUARTER PART STRUCTURE

PROBLEM TO BE SOLVED: To provide a vehicle quarter part structure capable of efficiently transmitting and dispersing a load acting on a sash guide fitting part of a vehicle quarter part to other parts of the vehicle.SOLUTION: A vehicle quarter part 102 includes: a quarter inner panel 110 disposed between a rear side door opening 104 and a back door opening 106; and a quarter inner front reinforce 112 which reinforces a rear edge of the rear side door opening 104. The quarter inner panel 110 includes a sash guide fitting part 126, to which a sash guide 124 is fitted, at a center lower part. The quarter inner front reinforce includes an inclined part 130 which goes down along the rear edge and extends to the front side of a vehicle. The quarter inner front reinforce 112 further includes an extension part 132 in which an upper end extends to the rear side of the vehicle, and the extension part 132 overlaps with the sash guide fitting part 126 of the quarter inner panel 110.