IS-LM模型（英语：Investment—Saving / Liquidity preference—Money supply model）是一个总体经济模型。它表现了货币市场的利率，与商品及服务市场的实质商品产出之间的关系。IS和LM曲线的交点是产品市场和货币市场两者同时达到均衡的标志。也被称为一般均衡。新古典综合学派用此来解释凯恩斯的宏观经济学理论思想。凯恩斯认为政府行为可以有效地干预经济发展。

IS-LM模型和他表述的基本理论散见于各种宏观经济学理论。本·伯南克曾这样评述：“不管他们把IS-LM模型叫什幺，绝大多数宏观经济学家都在使用这类的模型来组织思考总供给是如何受到其他因素的影响。”

The IS–LM model, or Hicks–Hansen model, is a macroeconomic tool that shows the relationship between interest rates and real output in the goods and services market and the money market (also known as the assets market). The intersection of the "investment–saving" (IS) and "liquidity preference–money supply" (LM) curves is the "general equilibrium" where there is simultaneous equilibrium in both markets. Two equivalent interpretations are possible: first, the IS–LM model explains changes in national income when the price level is fixed in the short-run; second, the IS–LM model shows why the aggregate demand curve shifts. Hence, this tool is sometimes used not only to analyse the fluctuations of the economy but also to find appropriate stabilisation policies.