Objective To detect the relationship between obstructive sleep apnea hypopnea syndrome (OSAHS) and vestibular nerve function by cervical vestibular evoked myogenic potential (cVEMP). Methods Cervical vestibular evoked myogenic potential (cVEMP) of 54 OSAHS patients and 49 age-matched volunteers who matched the criteria was monitored to compare the indicators between the two groups. Results (1) The cVEMP extraction rate was lower in the OSAHS group than the normal group, and the differences of P1 latency, interwaveperiod, amplitude, and binaural asymmetry ratio (P<0.05) between tuo groups are statistically significant. The P1 latency and asymmetry ratio in the experimental group were larger than those in the control group, and the amplitude and interwave period were lower than those in the control group, while the N1 latency was not statistically significant (P>0.05). (2) The results of cVEMP in patients with mild, moderate OSAHS and severe OSAHS were not statistically significant. Conclusion Sleep apnea hypopnea syndrome can cause vestibular hypofunction.