Attachment structure of door mirror

1. An attachment structure of a door mirror, comprising:

a door provided on a driver's-seat side of a vehicle and comprising an inner panel and an outer panel;

a beltline reinforcement provided to extend along a beltline portion of the outer panel of the door for reinforcing the beltline portion;

at least two reinforcing members provided, separately from the beltline reinforcement and apart from each other in a vertical direction, between the inner panel and the outer panel of the door, extending in a vehicle longitudinal direction from a front end of the door to a rear end of the door, and fixed to the front and rear ends of the door at both ends thereof;

a door mirror reinforcement, to which the door mirror positioned in back of a front end of a side window of the door is fixed via the outer panel of the door; and

a connecting member formed separately from the door mirror reinforcement, the connecting member interconnecting the two reinforcing members vertically at a position which is located in back of front ends of the two reinforcing members,

wherein a front portion of said beltline reinforcement is arranged to overlap said door mirror reinforcement partially in the vehicle longitudinal direction,

said door mirror is configured to be fixed to the door mirror reinforcement and said front portion of the beltline reinforcement via the outer panel,

an upper-level member of said two reinforcing members is made of a pipe-shaped member, and

said connecting member and said door mirror reinforcement are arranged to overlap each other partially in the vertical direction, interposing said pipe-shaped reinforcing member therebetween, such that the pipe-shaped reinforcing member is held by and fixed to the connecting member and the door mirror reinforcement.

2. The attachment structure of a door mirror of claim 1 , wherein said connecting member is fixed to an inward side, in a vehicle width direction, of one of said two reinforcing members and to an outward side, in the vehicle width direction, of the other of the two reinforcing members.

3. The attachment structure of a door mirror of claim 1 , wherein said two reinforcing members are configured such that a distance, in the vertical direction, of the two reinforcing members increases toward a vehicle rear.

4. The attachment structure of a door mirror of claim 2 , wherein said two reinforcing members are configured such that a distance, in the vertical direction, of the two reinforcing members increases toward a vehicle rear.

5. The attachment structure of a door mirror of claim 2 , wherein said other of the two reinforcing members extends substantially horizontally from a position of a door hinge, and said one of the two reinforcing members is arranged below the other of the two reinforcing members.

6. The attachment structure of a door mirror of claim 3 , wherein said other of the two reinforcing members extends substantially horizontally from a position of a door hinge, and said one of the two reinforcing members is arranged below the other of the two reinforcing members.

7. The attachment structure of a door mirror of claim 4 , wherein said other of the two reinforcing members extends substantially horizontally from a position of a door hinge, and said one of the two reinforcing members is arranged below the other of the two reinforcing members.

8. The attachment structure of a door mirror of claim 1 , wherein said connecting member has a projection portion which projects in an arc shape along an outer face of said pipe-shaped reinforcing member, said door mirror reinforcement has a recess portion which is concaved in an arc shape along the outer face of the pipe-shaped reinforcing member, and the pipe-shaped reinforcing member is held by and fixed to said projection portion of the connecting member and said recess portion of the door mirror reinforcement.