《韩非子》又称《韩子》，是中国先秦时期法家代表思想家人物韩非的论着，为法家集大成的思想作品，为韩非对社会各种领域的思维，有系统的对政治策略立场主张的阐发，全面性政策设计表述和深度的对统治技术探究，内容充满批判与汲取先秦诸子多派的观点，因韩非就学于儒家的荀子，又推究老子思想，是中国历史上第一部对《道德经》加以论注的思想著作，更是一部对各个法家流派集其大成的旷世巨作。

在政治上，《韩非子》呈现韩非极为重视唯物主义与效益主义思想，积极倡导专制主义理论。目的为君主提供富国强兵的霸道思想。在《史记》记载：秦王见《孤愤》、《五蠹》之书，曰：「嗟乎，寡人得见此人与之游，死不恨矣！」可知当时秦始皇的重视。

The Han Feizi (Chinese:韓非子; Old Chinese: *[g]ˤar pəj tsəʔ) is an ancient Chinese text attributed to foundational political philosopher, "Master" Han Fei. It comprises a selection of essays in the "Legalist" tradition on theories of state power, synthesizing the methodologies of his predecessors. Its 55 chapters are the only such text to survive intact, most of which date to the Warring States period mid-3rd century BC. Though differing considerably in style, their coherency lends itself to the possibility that they were written by Han Fei himself. It is generally considered more philosophically engaging than the Book of Lord Shang. It is also valuable for its abundance of anecdotes about pre-Qin China.