This elastic nonwoven fabric manufacturing method involves: a conveyance step for conveying, in a conveyance direction, a nonwoven fabric that contains elastic fibers which are elastic, and extensible fibers which are less elastic than the elastic fibers a first processing step in which the nonwoven fabric is extended by being passed through a pair of first gear rollers and in which at least some of the extensible fibers are stretched a stretching step in which, after the first processing step, the nonwoven fabric is stretched in the conveyance direction and a second processing step in which, after the stretching step, the nonwoven fabric is stretched by being passed through a pair of second gear rollers that include an area where teeth are formed on the peripheral surface and an area where no teeth are formed, and at least some of the elastic fibers are cut.
