A lengthways stretchable elastic band having two edges is provided. The elastic band comprises a plurality of longitudinal elastic yarn segments and at least one elastic thread area, which extends to the two edges of the elastic band. The plurality of longitudinal elastic yarn segments are made of elastic yarns and the elastic thread area is made of elastic threads. The elastic band is formed by connecting the plurality of longitudinal elastic yarn segments together using the elastic thread area. The elastic thread area connects the plurality of longitudinal yarn segments by tying the ends of the elastic threads to the ends of the elastic yarns. As such, when the elastic band is under a force, it can be expanded both lengthways and sideways, thereby obtaining multi-directional extensibility.