The present invention provides a dynamic hand assistive device, which includes: wrist unit, which is connected with a thumb unit, a index finger unit, a middle finger unit, a ring finger unit and a small finger unit respectively wherein the index finger unit, the middle finger unit, the ring finger unit and the small finger unit is having a linearly elastic material wherein the wrist unit, the thumb unit and the index finger unit are connected by three linkages.本發明提供一手部動態輔具,其包含:一手腕套件,其係分別與一拇指套件、一食指套件、一中指套件、一無名指套件及一小指套件相連接;其中前述食指套件、中指套件、無名指套件及小指套件係包含一彈性線材;其中前述手腕套件、拇指套件及食指套件係由三連桿所連接。10‧‧‧手腕套件11‧‧‧橈腕關節(Radiocarpal joint)對應處12‧‧‧手背對應處13‧‧‧前臂對應處20‧‧‧拇指套件22‧‧‧第一掌指關節(first metacarpophalangeal joints)之饒側對應處30‧‧‧食指套件31‧‧‧第二掌指關節(second metacarpophalangeal joints)之饒側對應處40‧‧‧中指套件50‧‧‧無名指套件60‧‧‧小指套件70‧‧‧彈性線材80‧‧‧三連桿81‧‧‧第一連桿82‧‧‧第二連桿83‧‧‧第三連桿84‧‧‧固定距離100‧‧‧手部動態輔具
