a spring manufacturing apparatus with a reduced number of driving sources , yet capable of adjusting the relative positions among the bending dices with higher precision when manufacturing a spring is to be provided . a second bending dice mounting slider and a third bending dice mounting slider are symmetrically located about a center line extended from a moving direction of a first bending dice mounting slider . an arm mechanically connects the first bending dice mounting slider and the second bending dice mounting slider , or the first bending dice mounting slider and the third bending dice mounting slider , so that either of a driving source that drives the second bending dice mounting slider or a driving source that drives the third - bending dice mounting slider moves the first bending dice mounting slider , thus to determine a winding direction of a wire for manufacturing a spring .