绥靖主义（汉语拼音：suíjìng；注音符号：ㄙㄨㄟ ㄐㄧㄥˋ；英语：Appeasement，「慰抚」之意。），以绥（安抚）的手段促使靖（局势安定），又称为姑息主义。中华民国政府在中国大陆时期曾设立过多个“绥靖公署”，意图维护地区局势。

绥靖政策是一种通过在某些可能导致战争的事务上作出让步来避免战争的外交政策。汉语中，这个词一般用于贬义，且现在一般特指1930年代英、美、法、苏等大国对德、意、日侵略者姑息、纵容，牺牲他国的领土主权以至本国利益去满足侵略者的欲望，以望和平的政策。

Appeasement in a political context is a diplomatic policy of making political or material concessions to an enemy power in order to avoid conflict.

The term is most often applied to the foreign policy of the British Prime Ministers Ramsay Macdonald, Stanley Baldwin and Neville Chamberlain towards Nazi Germany between 1935 and 1939. Their policies of avoiding war with Germany have been the subject of intense debate for more than seventy years among academics, politicians and diplomats. The historians' assessments have ranged from condemnation for allowing Adolf Hitler's Germany to grow too strong, to the judgment that they had no alternative and acted in Britain's best interests. At the time, these concessions were widely seen as positive, and the Munich Pact concluded on 30 September 1938 among Germany, Britain, France, and Italy prompted Chamberlain to announce that he had secured "peace for our time."