The invention relates to a lockable hinge for an orthosis. The lockable hinge comprises a first side bar and a second side bar, a bridging element and a locking mechanism. A first end of the first side bar is fixedly mounted to a first portion of the bridging element, and a first end of the second side bar is rotatably mounted to a second portion of the bridging element. The locking mechanism is supported by the first side bar, and the locking mechanism comprises a locking block being slidable along the longitudinal extension of the first side bar between a locked position and an unlocked position. In the locked position the locking block engages by wedging between the second side bar and the bridging element, whereby the second side bar in the locked position is fixedly aligned with the first side bar.
