Objectives To compare the therapeutic effect of ultrasound guided soyeom pharmacopuncture therapy and unguided soyeom pharmacopuncture therapy on cervical facet joint of patient who have cervical pain caused by traffic accidents. Methods The study was planned as a retrospective study that analyzes the patient's medical records. We analyzed medical records of 20 patients with acute cervical pain caused by traffic accidents from April 1, 2022 to May 31, 2022. 10 patients (Group A) were treated ultrasound guided soyeom pharmacopuncture therapy on cervical facet joint, 10 patients (Group B) were treated unguided soyeom pharmacopuncture therapy on cervical facet joint. We used visual analogue scale (VAS) and neck disability index (NDI) to evaluate improvements in cervical functions and pain, five point Likert scale to estimate patient's satisfaction. We used the IBM SPSS Statistics version 25 program (IBM Co., Armonk, NY, USA) for statistical analysis. Results Group A showed a significant decrease in the VAS on the 5 th day of the soyeom pharmacopuncture therapy (p=0.001). However, there was no statistically significant difference of VAS between two groups (p=0.142). Group A showed significant decrease in the NDI on the 5 th day of the therapy (p=0.002). Also, there was statistically significant difference on NDI between two groups (p=0.018). Difference of five point Likert scale between two groups was not statistically significant (p=0.407). Conclusions In patients of acute cervical pain caused by traffic accidents, ultrasound guided soyeom pharmacopuncture therapy on cervical facet joint showed significant efficacy on reduction of neck disability compared with unguided therapy.