Abstract: A mobile work unit (1) having raisable and lowerable support legs (4, 4'), which adjacent to one end portion are arranged pivotally attached to the work unit (1), and which during a pivoting movement can take up contact with a below located ground plane (6) under influence from an associated piston cylinder (5, 5'). According to the invention, at least one support leg (4, 4') is arranged supporting a linkshaped member (8), pivotally attached to the support leg (4, 4') and extending in a transverse direction extending relationship to the length direction of extension for the support leg (4, 4'). Associated piston cylinder (5, 5') for the operation of the support leg (4, 4') is arranged pivotally attached with a first end portion at the work unit (1), and with the second end portion pivotally attached adjacent to a first end portion of the linkshaped member (8).