In transferring and conveying an article between rotation conveyance bodies, the rotation conveyance bodies (1, 2) are placed so as to have a prescribed gap between pitch circles thereof, and the article is conveyed along a transition curve whose curvature continuously varies from the pitch circle curvature of a rotation conveyance body (1) before the transfer to the pitch circle curvature of a rotation conveyance body (2) after the transfer between both the pitch circles, whereby the article is transferred and conveyed with acceleration smoothly varying and without a change in the distance between the axes of the rotation conveyance bodies.