该文主要介绍了“合意瑕疵”理论的发展,并进行了若干研究。该文研究的重点在于,如何认识实际中进行了磋商,但是意思或意思形成的过程中存在问题的合意的效力,把此时的合意作为合意来处理必须具备哪些要件。该文首先对有关合意瑕疵的理论之争做概述,重点介绍日本新近出现的对“合意瑕疵”法律行为法的传统制度构成进行扩张的新动向。接着介绍其幕后出现的判例所采用的侵权行为法律构成的动向,并探讨其对法律行为法的影响。最后,以“合意瑕疵”理论中有关自己决定论与法律提供特殊保护之间的冲突与整合问题作结论。 This article mainly introduces the development of the theory of “desired blemish” and conducts some researches. The key point of this study is how to understand the practical validity of the problems that have been discussed in the process of formation of the meaning or the meaning, and to deal with the necessary elements of the concurrence at the time. This article first summarizes the theoretical controversy about the desired flaw, and focuses on the new trend of Japan's expansion of the traditional system constitution of the law of “desired flaw”. Then it introduces the trend of the constitution of infringement law adopted in the precedents that appear behind the scenes and discusses its influence on the legal act law. Finally, the paper concludes with a discussion of the conflict and integration between the “desired flaw” theory and the special protection provided by the law of self-determination.