Provided is a coated fabric for airbags that exhibits a small variation in air permeability of the fabric in the width direction, and a method for producing a coated fabric for airbags capable of reducing the variation in air permeability. The coated fabric for airbags includes a woven fabric composed of synthetic fiber filaments and has an elastomer resin applied to one surface thereof, the coated fabric having an air permeability in the width direction of the coated fabric such that the maximum value of the air permeability is 1.5 times the average value or less.