An attachment structure of a door impact bar, for attaching an end of the door impact bar to an inner panel, and the attachment structure comprising: a bracket including a base which is attached to the inner panel, a distal part to which the end of the door impact bar is attached, and a leg part which extends between the distal part and the base and connects the distal part with the base, wherein the base includes a pair of base bond pieces respectively welded to the inner panel in places separated in a first direction orthogonal to a longitudinal direction of the door impact bar with sandwiching the door impact bar therebetween, in view from the longitudinal direction of the door impact bar, the distal part includes a distal part bond piece extending in the first direction, wherein the end of the door impact bar is welded to an intermediate part of the distal part bond piece in the first direction, and the leg part includes a pair of leg pieces respectively connecting both ends of the distal part bond piece in the first direction to ends of the pair of base bond pieces, characterised in that deformation induction parts, in which deformation is induced at the time of applying a collision load to the door impact bar, are respectively formed in the intermediate parts of the pair of leg pieces in extension directions thereof; in the leg pieces, ends of a pair of base leg pieces connected to each of the base bond pieces are connected to ends of a pair of distal part leg pieces connected to both of the ends of the distal part bond piece; and the deformation induction parts are provided in places in which the ends of the pair of base leg pieces are connected to the ends of the pair of distal part leg pieces; when the collision load is applied to the door impact bar, the bracket is deformed at the deformation induction part and supports the door impact bar through the pair of base leg pieces. a bracket including a base which is attached to the inner panel, a distal part to which the end of the door impact bar is attached, and a leg part which extends between the distal part and the base and connects the distal part with the base, wherein the base includes a pair of base bond pieces respectively welded to the inner panel in places separated in a first direction orthogonal to a longitudinal direction of the door impact bar with sandwiching the door impact bar therebetween, in view from the longitudinal direction of the door impact bar, the distal part includes a distal part bond piece extending in the first direction, wherein the end of the door impact bar is welded to an intermediate part of the distal part bond piece in the first direction, and the leg part includes a pair of leg pieces respectively connecting both ends of the distal part bond piece in the first direction to ends of the pair of base bond pieces, characterised in that deformation induction parts, in which deformation is induced at the time of applying a collision load to the door impact bar, are respectively formed in the intermediate parts of the pair of leg pieces in extension directions thereof; in the leg pieces, ends of a pair of base leg pieces connected to each of the base bond pieces are connected to ends of a pair of distal part leg pieces connected to both of the ends of the distal part bond piece; and the deformation induction parts are provided in places in which the ends of the pair of base leg pieces are connected to the ends of the pair of distal part leg pieces; when the collision load is applied to the door impact bar, the bracket is deformed at the deformation induction part and supports the door impact bar through the pair of base leg pieces.