To prevent the peeling of the folding part of a carcass cord.

While a core C in the shape of a doughnut as a whole is divided/actuated in the circumferential direction, on the peripheral surface, the carcass cord 35 fed from a thread guide is extended in the meridian direction of the core C and stuck. At the tip of an arm 1, the thread guide reciprocated in the meridian direction of the core along the peripheral surface of the core is formed, in the turn-around part of the reciprocation of the thread guide, a pin 33 which winds and supports the carcass cord and contacts the core and a press part 29 which presses the folding part 37 of the carcass cord to the core C by its advancing displacement to the pin 33 are provided, a folding part pressing block 25 which is displaced in the dividing direction associated with the dividing/actuating of the core C is installed, and a moving pressing block 23 which is displaced by two pitches of the dividing/actuating of core C while the folding part 37 of the carcass cord stuck already on the peripheral surface of the core C is pressed to the core C is installed.