A kind of clamping device, is suitable for one elastic band of clamping, which includes a load bearing unit and two clamping pieces. The load bearing unit includes a joint portion, and two by the equidirectional extension in the joint portion freedom portion, the grade clamping pieces are made of the hard material with elasticity, and it is fixed on the inside of the corresponding freedom portion of what respectively, each clamping piece includes a cantilever, the cantilever has a clamping face, and the grade cantilevers are directed towards the joint portion. The grade clamping pieces can move between a clip position and a non-clamping position, when in the clip position, the grade clamping faces, which are able to cooperate, clamps the elastic band, and the grade cantilevers then can be stronger with the power for pullling the elastic band, and generating more elastic deformations enables the grade clamping faces to be more forcibly engaged the clamping elastic band, therefore safe to use.一種夾持裝置，適用於夾持一彈力帶，該夾持裝置包含一承載單元，及兩夾持件。該承載單元包括一接合部，及二由該接合部同方向延伸的自由部，該等夾持件是由具有彈性之硬質材質製成，並分別固定於相對應之自由部內側，每一夾持件包括一懸臂，該懸臂具有一夾持面，且該等懸臂是朝向該接合部。該等夾持件可以在一夾持位置與一非夾持位置間移動，當在該夾持位置時，該等夾持面能配合夾持住該彈力帶，而該等懸臂則可隨拉扯該彈力帶之力道愈強，而產生更多的彈性形變使該等夾持面能更用力地咬合夾固該彈力帶，因此使用安全性高。
