归结主义（英语：Consequentialism）又称 结果主义、效果主义、效果论，是伦理学中的学说，指一个行为的对错要视该行为就总体而言是否达到最高内在价值来决定，即结果主义的道德推理取决于道德行为的后果。

Consequentialism is the class of normative ethical theories holding that the consequences of one's conduct are the ultimate basis for any judgment about the rightness or wrongness of that conduct. Thus, from a consequentialist standpoint, a morally right act (or omission from acting) is one that will produce a good outcome, or consequence. In an extreme form, the idea of consequentialism is commonly encapsulated in the English saying, "the end justifies the means", meaning that if a goal is morally important enough, any method of achieving it is acceptable.