This study aims to analyze the factors that affect the merchants’satisfaction level regarding built environments of the pedestrian street in the commercial business district (CBD) of Cheongju City. To reach the objective, this study employed questionnaire survey method, and statistical analysis method. The questionnaires were composed of 27 questions (9 for safety, 10 for convenience, 6 for the functionality of the street, 1 for general satisfaction level), and distributed to the merchants working on the pedestrian street (Seongan-Ro). This study has found the following results through multiple regression analysis. 1) Merchants showed their satisfaction level in the order of safety, street functionality, and convenience, but the levels of all categories were low. 2) Among three categories, street functionality was the most important factor that affected the merchants’ satisfaction level. Especially, the things to see, play, and buy were statistically significant to determine the satisfaction level of merchants' in Seongan-Ro.