Vehicle lower part structure

A vehicle lower part structure comprising:

• a battery case mounted on a side below a floor panel of a vehicle in an up-down direction of the vehicle;
• a cross member extending in a vehicle width direction, between the floor panel and the battery case, and forward of a rear portion of a support member in a front-rear direction of the vehicle, the support member supporting a front seat of the vehicle;
• a rocker extending in the front-rear direction of the vehicle on an outer side of the cross member in the vehicle width direction;
• and
• a connecting member that is constituted in a closed sectional shape and that connects an outer end portion of the cross member in the vehicle width direction and the rocker,
• wherein a first fragile portion and a second fragile portion extending in the front-rear direction of the vehicle in order from an outermost side to an inner side in the vehicle width direction in an upper wall of the connecting member, are constituted, and a third fragile portion extending in the front-rear direction of the vehicle in an lower wall of the connecting member between the first fragile portion and the second fragile portion in a front view, is constituted, and
• wherein a distance between the first fragile portion and the third fragile portion along the vehicle width direction is shorter than a distance between the second fragile portion and the third fragile portion along the vehicle width direction.