Multiaxial ratcheting characteristics of vulcanized natural rubber (NR) at room temperature were studied experimentally. The effects of axial stress, shear strain amplitude, shear strain rate, and their histories on ratcheting behavior were discussed. It is shown that the ratcheting strain depends on the axial stress and cyclic strain range. The ratcheting strain increases more rapidly as the constant axial stress or shear strain amplitude become larger. The ratcheting behaviors of the rubber exhibit nonsensitivity to the applied cyclic stress rate except initial axial strain. Furthermore, the loading histories also play an important role in progress of ratcheting. The prior cycles with higher axial stress, larger strain range or lower strain rate greatly restrains ratcheting strain of subsequent cycling with lower ones. Influence of creep on ratcheting behavior can not be neglected and its value reaches 87% of ratcheting strain. POLYM. ENG. SCI., 49:506-513, 2009. (c) 2009 Society of Plastics Engineers