The present invention relates to upper body exercise mechanism, and the said support cushion is fit and supported are fixed bar is provided with a first frame coupled integrally bonded integrally shifting pivoting hinge of the pair of the first frame supporting portion, wherein the pivoting hinge If rotatably on the side turning bar is combined with the above are combined into a meeting as one body includes bars the locking engagement being cushioned fit fixed doedoe jam cushion side is rotated to the vertical fixing pin through the bar pivot hinge side and pivoting coupling pivot bar and a rotating part which rotates the limit, the folding is possible in the first frame and the second frame is combined with the cushion part is at least one backrest coupled to the second frame for supporting a user's buttocks and the like, the support the interior of the rotating part has a plurality of rollers are coupled to the roll rotation and locking to cross the roller is at both ends is fixed to the rotation described first frame consists of parts of the tension that contains the band to provide an elastic force when the pivot portion pivoting If would have been combined with the locking pin can be cushioned and jam secure the legs to cushion siteop movement is possible, and the fixing by removing the pin as an exercise for rotating the rotary receiving the elasticity of the band eastern upper leg-up exercise , and configured to enable the upper abdomen, and lower abdomen movement of a single movement mechanism and so there is an effect that can be easily replaced without the training of the various parts of the change in muscle action and movement mechanism.