The present invention relates to a lifting device which comprises a frame part (1), a transversal support (3) attached to one end of the frame part and lifting arms (4) attached to the transversal support in a distance from each other, which lifting arms are removable under a load to be lifted as well as a transporting equipment (5) placed in lifting arms for moving the lifting arms on a surface. The lifting device in accordance with the invention comprises drive mechanisms (6) placed in lifting arms for driving the transporting equipment in lifting arms (4) separately and for steering the lifting arms.