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Tai Chi has been reported to be effective in improving postural stability in older adults but the acute effects of Tai Chi on healthy young adults, however, has yet to be investigated. Therefore, the purpose of this pilot study was to explore if there was an interaction effect between eye and surface conditions on measures of mean sway velocity (MSV) and 95% ellipitcal area (EA). The pre-/post-test measures of postural stability from 15 participants under eyes open and eyes closed and firm/foam surface conditions were examined. Change scores for MSV and EA were obrained by substracting pretest from posttest data after completing a 5-posture form Tai Chi exercise. A two-way ANOVA was conducted to examine the interaction effect between the eye and surface conditions for MSV and EA. The results demonstrated that Tai Chi did not acutely effect postural stability.