To form a connected nails with two processes of a raw material forming process to cut a band like metal and a connected nail forming process with die forging and to improve the productivity.

This production has a raw material forming process S1 to form a connected nail raw material having nail forming shaft like parts 5 arranging like a strip of paper and being connected with each other through a connecting part 3 between cut lines 4, 4 by cutting a band like metal in the longitudinal direction at a definite interval and remaining the partial connecting part 3, and a connected nail forming process S2 to form the connected nails 10 with a nail like body 7 arranging through a joining part 9 by forming, with the die forging, the shaft like part 5 of the connected nail raw material into a nail like body 7 and forming the connecting part 3 into a thinner wall joining part 9.