[Purpose] This study investigated to determine whether the Sideways Stepping Test (SST) is a useful test to detect unilateral vestibular hypofunction (UVH). [Subjects and Methods] Twenty-eight subjects including both male and females between the ages of 25 and 55 who had been diagnosed with UVH were recruited for the study. All the subjects were tested with the SST and followed by the head-shaking nystagmus (HSN) test using video electronystagmography (VENG) to confirm the presence of UVH. The results of both tests were then compared with each other to determine the correlation, sensitivity, and specificity. [Results] The results showed that the SST is strongly correlated with the gold standard HSN test using VENG and is highly sensitive and specific. [Conclusion] The present study showed that the SST is a highly valid test that can be used as an alternative method to the gold standard HSN test using VENG in detecting UVH.