A method of jointing a cord fabric when the cord fabric for topping is alternately drawn from two supply positions for continuous supply. During drawing to supply of the cord fabric on one side, a start end portion of the cord fabric on other side is locked to hold by a locking pin of a jointing holder, and is set to a jointing mounting portion in a state where an unvulcanized jointing rubber member is pasted thereto. When a final end of the cord fabric on the one side comes closer, a finish end portion thereof is pasted to the start end portion of the cord fabric held by the holder by interposing the rubber member therebetween. The finish end portion and the start end portion are squeezed for joint from upper and lower sides by press members, thereafter, the holder is removed, and the cord fabric on the other side is drawn to supply continuously to the cord fabric on the one side.