A chairless chair exoskeleton in order to provide seating support to the user while the user is standing particularly in industrial field includes at least one foot connection element for being connected to the foot of the user and at least one calf support element connected to said foot connection element, and at least one thigh support element connected to said calf support element by means of at least one joint and at least one energy storage element associated to the thigh support element from one side and associated to the calf support element from the other side.