OMNIDIRECTIONAL WHEEL

An omnidirectional wheel (100) includes a hub (10) and a number of wheels (20). The hub defines a number of mounting grooves (14). Each mounting groove defines an axle (15) provided therein. Each wheel includes a roller (21) and a cover layer (22). Each of two ends of the roller defines a fixing hole (210). The axle extends through each of the two holes. The cover layer is sleeved on an outer side of the roller.