Owing to the saturation and competition in the health care market, some city medical associations demand their members to put ”four days off in one month” into practice. However, according to the Fair Trade Act, which can apply to the medical association, this Law is enacted for the purposes of maintaining trading order, protecting consumers' interests, ensuring fair competition, and promoting economic stability and prosperity. The enforcement by the medical association remains a controversy worthy further discussion. Therefore, the purpose of this paper was to examine this issue based on the juridical perspectives.