Vehicle body front section structure

A vehicle body front section structure comprising:

• a front side member;
• an outer side frame member that is disposed separated from the front side member at a vehicle width direction outer side, that has a vehicle front-rear direction rear end connected to an apron section or to a front pillar, and that has a vehicle front-rear direction front end side overlapping with a vehicle front-rear direction front end side of the front side member in side view;
• a linking member that links the vehicle front-rear direction front end side of the front side member and the vehicle front-rear direction front end side of the outer side frame member, and that is input with a collision load;
• and
• a reinforcing structure that reinforces the outer side frame member at a portion of the outer side frame member overlapping with the front side member in side view, wherein
• a cross-section of the outer side frame member orthogonal to a length direction thereof configures a closed cross-section;
• the reinforcing structure configures a closed cross-section structure provided inside the closed cross-section;
• and the reinforcing structure is joined to the outer side frame member at a flange that extends from a rear end of a wall of the reinforcing structure.