A side vehicle-body structure of a vehicle includes a rear door having a center pillar extending in a vehicle up-down direction built in a front portion of the rear door, and a front door having a door impact bar extending in a vehicle front-rear direction built in the front door. A rear end of the door impact bar is disposed to overlap with the center pillar in a vehicle side view, a reinforcement gusset that connects a lower portion of the front door and a rear portion of the door impact bar to each other is included in an inner portion of the front door, and a side sill extending in the vehicle front-rear direction is adjacently disposed below a connecting portion of a lower portion of the front door at which the lower portion of the front door is connected to the reinforcement gusset.