Abstract: A shoe includes a shoe body, which forms an accommodation space; and an elastic structure, which includes an elastic connector; a first coupling section that is mounted to an end of the elastic connector; and a second coupling section that is set opposite to the first coupling section and is mounted to an opposite end of the elastic connector. The first coupling section is set at one side of the accommodation space and the second coupling section is set at an opposite side of the accommodation space. As such, when a wearer puts her foot in the shoe body, the elastic connector can be fit over a heel of the wearer so that the shoe body is securely attached to the foot of the wearer without undesired separation, whereby an effect of preventing separation of the shoe body can be achieved when the wearer is walking.