货币中立性（英语：Neutrality of money），又称货币中性、中性货币说，经济学上的假说，这个理论认为，货币存量的改变，对经济体只有名目上的影响，但不会带来实质的改变。包括名目价格、名目工资与名目汇率，可能会受到货币数量改变的影响，但是在进行通货膨胀调整后的实质GDP、实质工资、实质价格等，都不会有改变。

这个学说始于古典经济学，在古典二分法（Classical dichotomy）中有重要地位。这个学说认为货币只是一层面纱，实物经济与货币经济没有什么不同，萨伊定律应用了货币中立性假设作为前提。这个学说也意味着，中央银行增加货币供应量时，只会造成物价同比例上升，但是实质购买力与生产力都不会有改变，因此对于市场完全不会有影响。

Neutrality of money is the idea that a change in the stock of money affects only nominal variables in the economy such as prices, wages, and exchange rates, with no effect on real variables, like employment, real GDP, and real consumption. Neutrality of money is an important idea in classical economics and is related to the classical dichotomy. It implies that the central bank does not affect the real economy (e.g., the number of jobs, the size of real GDP, the amount of real investment) by printing money. Instead, any increase in the supply of money would be offset by a proportional rise in prices and wages. This assumption underlies some mainstream macroeconomic models (e.g., real business cycle models). Others like monetarism view money as being neutral only in the long-run.