Vehicle body frame structure

A vehicle body frame structure for a vehicle, the vehicle body frame structure comprising:

• side sills extending in a front-rear direction of the vehicle on respective sides in a width direction of the vehicle;
• a cross member extending in the width direction in a central part of the vehicle in the front-rear direction, the cross member being coupled to the side sills at respective ends in the width direction;
• and
• a floor pan extending toward a vehicle rear side of the cross member in a lower part of the vehicle, wherein
• the cross member comprises a cross member front and a cross member rear coupled to each other, the cross member front constitutes a wall surface on a vehicle front side of the cross member, and the cross member rear constitutes a wall surface on the vehicle rear side of the cross member,
• a vehicle rear upper end of the cross member rear and a vehicle front lower end of the floor pan are coupled to each other in an up-down direction of the vehicle, and
• a side in the width direction that constitutes the vehicle rear upper end of the cross member rear has slants extending from inside in the width direction toward outside of a rear part of the vehicle.