Vehicle chassis front section structure

A vehicle chassis front section structure comprising:

• a lateral-section frame disposed on outside in a vehicle widthwise direction of a front side frame, the lateral-section frame including
• a wheel housing upper member with a rear end connected to a front pillar, and
• a wheel housing lower member extending forward and downward from the wheel housing upper member via an upper curved section and a lower curved section of the wheel housing lower member with a front end of the wheel housing lower member located substantially at the same position in terms of a vertical direction and a longitudinal direction as a front end of the front side frame, wherein
• a reinforcement member extending forward and rearward across the upper curved section is attached to interior of the wheel housing lower member, and
• the reinforcement member includes
• a front rigid section and a rear rigid section attached to a lower surface section and a side surface section of the wheel housing lower member across an inside ridge, and
• a connecting section attached to at least the side surface section and connecting the front rigid section and the rear rigid section to each other,
• a recess configured to induce a deformation of the upper curved section in case of input of a collision load is formed on the inside ridge at the upper curved section, and
• the reinforcement member is disposed around the recess.