A vehicle-body structure of a vehicle , comprising: a vehicle-body frame member forming an opening portion for entrance at a vehicle side part; and a side door provided so as to open and/or close the opening portion , wherein the side door comprises a door panel portion and a reinforcement portion (71 to 74) provided at a peripheral part of the door panel portion such that the reinforcement portion (71 to 74) overlaps with the vehicle-body frame member in a vehicle side view, the reinforcement portion (71 to 74) being a plate member, wherein the vehicle-body frame member comprises a side sill , a hinge pillar , a center pillar , and a roof side rail , and the peripheral part of the door panel portion comprises plural overlapping portions which respectively overlap with the side sill , the hinge pillar , the center pillar , and the roof side rail in the vehicle side view, characterized in that the reinforcement portion (71 to 74) comprises a lower-side reinforcement portion attached to the overlapping portion which overlaps with the side sill , a front-side reinforcement portion attached to the overlapping portion which overlaps with the hinge pillar , a rear-side reinforcement portion attached to the overlapping portion which overlaps with the center pillar , and an upper-side reinforcement portion attached to the overlapping portion which overlaps with the roof side rail , a side-sill reinforcement is provided inside the side sill , a hinge-pillar reinforcement is provided inside the hinge pillar , a center-pillar reinforcement is provided inside the center pillar , and a roof-side reinforcement is provided inside the roof side rail . a vehicle-body frame member forming an opening portion for entrance at a vehicle side part; and a side door provided so as to open and/or close the opening portion , wherein the side door comprises a door panel portion and a reinforcement portion (71 to 74) provided at a peripheral part of the door panel portion such that the reinforcement portion (71 to 74) overlaps with the vehicle-body frame member in a vehicle side view, the reinforcement portion (71 to 74) being a plate member, wherein the vehicle-body frame member comprises a side sill , a hinge pillar , a center pillar , and a roof side rail , and the peripheral part of the door panel portion comprises plural overlapping portions which respectively overlap with the side sill , the hinge pillar , the center pillar , and the roof side rail in the vehicle side view, characterized in that the reinforcement portion (71 to 74) comprises a lower-side reinforcement portion attached to the overlapping portion which overlaps with the side sill , a front-side reinforcement portion attached to the overlapping portion which overlaps with the hinge pillar , a rear-side reinforcement portion attached to the overlapping portion which overlaps with the center pillar , and an upper-side reinforcement portion attached to the overlapping portion which overlaps with the roof side rail , a side-sill reinforcement is provided inside the side sill , a hinge-pillar reinforcement is provided inside the hinge pillar , a center-pillar reinforcement is provided inside the center pillar , and a roof-side reinforcement is provided inside the roof side rail . <EOS>