不能抵抗的力量（拉丁語：vis major）或不可抗力是法律術語，指無法以審慎、努力及謹慎防止的情況，例如意外事故或天災。
不可抗力是嚴格法律責任的例外情況。
參見
參考
- Black's Law Dictionary, P.1567, 7th Edn.,
- Mitra's Legal & Commercial Dictionary – 4th Edn., Eastern Law House, Page 790
- Prosser Wade and Schwartz's Torts: Cases and Materials, 11th Edn., Foundation Press, P. 694
