Vehicle body lower portion structure

A vehicle body lower portion structure comprising:

• a loading member disposed below a floor of a vehicle;
• and
• a support plate including
• a flat plate-shaped support portion that is formed in a plate shape of a fiber-reinforced resin material, an attachment portion of the loading member being placed on and fixed to the support portion, and
• an extended end portion extending from the support portion, an inclined portion being formed at the extended end portion, the inclined portion being inflected toward a vehicle body upper side from the support portion or a projected portion of the support portion, and the inclined portion being inclined to a side away from the attachment portion of the loading member,
• wherein a lower face of the attachment portion of the loading member is fixed to the support portion of the support plate via an adhesive layer,
• an upper end of the inclined portion is configured to be disposed at a height that is at the vehicle body upper side relative to an upper end of the adhesive layer, and
• a filling portion is provided that is interposed between the inclined portion and the attachment portion of the loading member, and that is joined together with the adhesive layer.