The invented stretching device comprises two handholds, ring-shaped extendable elastic band, and two linking elements, preferably in the form of an ellipsoidal ring.The invented device is engineered so that it enables exercising in the vertical direction. It includes two loop-shaped handholds which are easy to hold with hands or support with leg thus ensuring safe exercising. The stretching device enables numerous exercises in the sitting position and activates the least active groups of muscles during sitting. The invented device is structurally robust, made of natural material, and easy to carry due to its low weight. The attachment with ellipsoidal rings is safer than other state of the art attachments of handholds to an elastic element, e.g. when sewn on latex. The advantage of this attachment is that good flexibility of these handholds is ensured in the sphere of action.