Patent ID: 8308492

Claim:
A board-to-board connector, the board-to-board connector comprising: a first connector, the first connector including a first housing, the first housing including: first terminals mounted therein, an island portion, concave insertion portions formed at both sides of the island portion, side wall portions formed at both sides of each of the concave insertion portions, and concave bracket holding portions formed on portions of both ends of the side wall portions; and a second connector configured to be tightly fitted to the first connector, the second connector including a second housing, the second housing including: second terminals contacting the first terminals, a recessed groove portion into which the island portion is inserted, and protrusive convex portions formed at both sides of the recessed groove portion to be inserted in the concave insertion portions; wherein: first stage fitting guides formed on inner ends of fitting surfaces of the side wall portions; second stage fitting guides formed on portions of the fitting surfaces of the side wall portions at both ends of the side wall portions to be disposed outside the first stage fitting guides and surrounding the concave bracket holding portions; the fitting surfaces of the side wall portions are at the same surface as a fitting surface of the island portion; and a distance from the second stage fitting guides on either left or right side to an opposite lateral surface of the island portion is longer than a distance from an outer lateral surface of each of the protrusive convex portions on either left or right side to an inner lateral surface of each of the protrusive convex portions on the other side.