A motion assist apparatus is provided with an attaching member that has a glove shape with finger portions and a middle hand portion that is attachable to one of hands of a user, a back-side actuator that is freely expanded and contracted, and bridged between a tip of each of the finger portions and the middle hand portion on the back side of the attaching member, and a palm-side actuator that is freely expanded and contracted, and bridged between the tip of each of the finger portions and the middle hand portion on the palm side of the attaching member, and in this structure, the palm-side actuator is provided with a wire unit formed of two wires that are disposed on each of the finger portions on the palm side from the tip of each of the finger portions on the back side to the middle hand portion along the finger portion, passing through two side portions of the finger portion, so that intervals therebetween are made different at respective positions corresponding to joints of the finger portion, and rubber artificial muscle is coupled to the wire unit and is formed on the middle hand portion.
