To prevent water from leaking to the rear side of an exterior material by securing waterproofness in the circumference of a joint intersection part formed of four four-face ship lap joint exterior materials adjoining the top/ bottom/right/left in the exterior surface and when water enters the joint, by quickly draining it.

This construction structure of fastening metals and four-face ship lap joint exterior materials is so formed that a fixing board 11 and a hook 12 erected to the fixing board 11 are provided, the hook 12 comprises two parts, the first hook part 12a and the second hook part 12b arranged as opposed to each other, the first hook part 12a has a notch 14 formed in one part from the tip toward the second hook part 12b, and the second hook part 12b has a claw piece 16 extended from the tip to the opposite direction to the first hook part 12a is arranged on the same line as the notch.