A side body structure for a vehicle includes a side sill. The side sill includes a closed cross sectional shape which is formed by a side sill inner and a side sill outer, the side sill inner includes an upper inner member and a lower inner member which are separate members, a tensile strength of the upper inner member being higher than a tensile strength of the lower inner member, the side sill has. At a front portion of the side sill, a deforming portion which is to be deformed by a load applied in a longitudinal direction of the side sill is provided. The upper inner member and the lower inner member are connected together by a reinforcing member which is disposed close to the deforming portion and in the closed cross section.