正当防卫的内涵和外延在法学理论上存在大量学说,在司法实践中也被认为是阻却违法性(有责性)的重要事由。偶然防卫在实践中极少存在,但在理论研究上却相对活跃,分析偶然防卫,对于更深地认识行为无价值与结果无价值,也有参考价值。目前的理论研究中,针对偶然防卫的认识不一。文章通过对有关观点的分析,得出相关结论。 The connotation and denotation of justifiable defense have a great deal of theory in the jurisprudence theory and are also considered as an important reason to stop illegality (accountability) in judicial practice. Although occasional defense rarely exists in practice, it is relatively active in theoretical research. Analyzing accidental defense is valuable for understanding the valuelessness of a behavior and the result as a result. In the current theoretical research, there are different understandings about accidental defense. Through the analysis of relevant views, the article draws relevant conclusions.