We developed psoas major muscle (PM) MR elastography (MRE) technique and reported shear modulus of the PM for the first time in the world. However, measurement precision (repeatability and reproducibility) of this technique was not assessed. In this study, repeatability with three repetitions and reproducibility with different three operators were evaluated. Repeatability of this technique was about the same as required for clinical liver MRE and reproducibility was almost perfect. The original vibration pad was focused on generating shear wave in the PM efficiently. The development of the vibration pad specialized for PM MRE resulted in acceptable repeatability and reproducibility.