The invention is a wearable mechatronic posture assisting device comprising an upper support (10) for connecting to the thigh of a person, a lower support (20) for connecting to the shank of the person and a joint (28) pivotably connecting both supports (10, 20), and a damper (30) with connectors (31 a, 32a) for pivotably connecting the damper (30) to the supports (10, 20). The damper (30) is designed to linearly damp the pivot of the joint (28). The damper (30) comprises a control means allowing a locking and a drive state (101, 103) of the damper (30).
