超中性子（英语：Neutralino），又译中性微子，是一种由超对称所预测的假想粒子。超中性子是费米子，且电荷为零，共有四种，最轻的超中性子一般是稳定的。它们的典型标记为（最轻的）、、及（最重的），但当超规范子的标记为时，就会改用。这四个态是超B子、中性超W子（即中性的电弱超规范子）与中性超希格斯粒子的混合态。由于超中性子为马约拉纳费米子，所以它们与其对应的反粒子完全相同。因为这些粒子只会与矢量玻色子产生弱相互作用，所以强子对撞机不能大量生产超中性子。它们主要出现在重粒子的衰变瀑布（即拥有多个步骤的衰变过程）中，一般由含色的超对称粒子所产生，例如超夸克及超胶子。

In supersymmetry, the neutralino is a hypothetical particle. There are four neutralinos that are fermions and are electrically neutral, the lightest of which is typically stable. They are typically labeled N͂0
1 (the lightest), N͂0
2, N͂0
3 and N͂0
4 (the heaviest) although sometimes is also used when is used to refer to charginos. These four states are mixtures of the bino and the neutral wino (which are the neutral electroweak gauginos), and the neutral higgsinos. As the neutralinos are Majorana fermions, each of them is identical to its antiparticle. Because these particles only interact with the weak vector bosons, they are not directly produced at hadron colliders in copious numbers. They would primarily appear as particles in cascade decays of heavier particles (decays that happen in multiple steps) usually originating from colored supersymmetric particles such as squarks or gluinos.