摘要： 在法律事实中，行为有合法行为和违法行为之分，这是针对不同类型的法律规范的要件所为的区分。从法律效果对法律要件的约束来看，违法行为是与损害赔偿等责任关联的法律要件，合法行为则无这种形态的法律效果。从法律要件的构成来看，违法行为是包含违法性要素的法律要件，合法行为没有这种构成要素。这种区分既涵括了法律规范的完整结构，又体现了法律规范的评价机制，是实现法律事实体系化的必要基础，不能被行为的其他分类所替代。而且，明晰了这种区分，还能澄清合法行为、违法行为在其他语境下的含义，有助于相关法律规范的准确理解和适用。

关键词: 法律事实, 合法行为, 违法行为, 法律要件, 法律效果

Abstract: In the range of legal facts，the acts can be differentiated into legitimate acts and illegitimate acts. Thecriterion of this kind of differentiation is the difference in legal requirements of the legal norms. As far as therestrictions of legal effects on legal requirements are concerned，illegitimate acts are the legal requirementswhich are in relation to compensational responsibility and some other responsibilities；meanwhile，however,legitimate acts can not lead to those kinds of legal effects. Besides，seeing from the perspective of the compo-sition of legal requirements，illegitimate acts are the legal requirements which contain the elements of illegal-ity；on the contrary，legitimate acts do not contain that kind of elements. On one hand，the differentiationnot only encompasses the whole structure of legal norms，but also reflects the evaluation system of legalnorms；on the other hand，it makes a necessary basis for the achievement of legal facts’systematization,and the differentiation can not be replaced by any other classification of legal facts. What’s more，beingclearly aware of the differentiation，we can also clarify the meanings of legitimate acts and illegitimate acts inother contexts，which contributes to an accurate comprehension and application of the legal norms related.

Key words: Legal fact, Legitimate act, Illegitimate act, Legal requirement, Legal effect