伊比鸠鲁学派（英语：Epicureanism）是以伊比鸠鲁的学说为基础，创建于西元前307年的一个哲学思想体系。伊比鸠鲁是原子论唯物主义者，拥护德谟克利特的理论。他不采信决定论，并提出偏斜的原则，反对迷信、否认神的干预。伊比鸠鲁延续了昔兰尼的阿瑞斯提普斯（苏格拉底的学生之一，较不为人所知）的论点，认为最大的善是驱逐恐惧、追求快乐，以达到一种宁静（ataraxia）且自由的状态，并透过知识免除生理的痛苦（aponia），降低欲望。所以伊比鸠鲁的弟子都有同样的基本知识，认为哲学必须贡献给宁和平静。

Epicureanism is a system of philosophy based upon the teachings of the ancient Greek philosopher Epicurus, founded around 307 BC. Epicurus was an atomic materialist, following in the steps of Democritus. His materialism led him to a general attack on superstition and divine intervention. Following Aristippus—about whom very little is known—Epicurus believed that what he called "pleasure" was the greatest good, but that the way to attain such pleasure was to live modestly, to gain knowledge of the workings of the world and to limit one's desires. This would lead one to attain a state of tranquility (ataraxia) and freedom from fear as well as an absence of bodily pain (aponia). The combination of these two states constitutes happiness in its highest form. Although Epicureanism is a form of hedonism insofar as it declares pleasure to be its sole intrinsic goal, the concept that the absence of pain and fear constitutes the greatest pleasure, and its advocacy of a simple life, make it very different from "hedonism" as it is colloquially understood.