Provided are an elastic sheet manufacturing device and a manufacturing method thereof. The manufacturing device is a manufacturing device of an elastic sheet along with the intersection direction. The manufacturing device includes a pair of rollers, a conveying mechanism, and a winding mechanism, the pair of rollers performs driving rotation while sandwiching continuous sheets through the oppositely arranged outer peripheries, and conveys the continuous sheets along the continuous direction, the conveying mechanism conveys a continuous body of a linear elastic part facing toward the part between the outer peripheries of the pair of rollers in order to connect the continuous body of the linear elastic part to the surfaces of the continuous sheets, and the winding mechanism winds the continuous body of the linear elastic part on the conveying mechanism in an extending manner while discharging the continuous body of the linear elastic part. At least one of the pair of rollers is provided with a hook part at each end of the intersection direction. The continuous body, carried by the outer peripheries of the rollers, of the linear elastic part, is hooked on the hook part.
