The invention relates to a clamping device (5) for a forklift (1). The clamping device (5) comprises a body (6) connectable to the forklift (1) at a loading area thereof, a clamping arm (7) connected to the body (6), the clamping arm (7) being moveable in relation to the body (6), and a drive unit arranged to move the clamping arm (7) between an idle position, in which the clamping arm (7) is located outside of the loading area, and a working position, in which the clamping arm (7) has been moved into the loading area to secure a load (2) carried by the forklift (1). The invention also relates to a forklift (1) for transporting a load (2).