Lashkar-e-Taiba (Urdu: لشکرطیبہ [ˈləʃkər eː ˈt̪ɛːjbaː]; literally Army of the Good, translated as Army of the Righteous, or Army of the Pure) – also transliterated as Lashkar-i-Tayyaba, Lashkar-e-Tayyaba, Lashkar-e-Tayyiba, Lashkar-i-Taiba, Lashkar Taiba or LeT – is one of the largest and most active militant Islamist terrorist organizations in South Asia, operating mainly from Pakistan.

It was founded by Hafiz Muhammad Saeed, Abdullah Yusuf Azzam and Zafar Iqbal in Afghanistan. With its headquarters based in Muridke, near Lahore in Punjab province of Pakistan, the group operates several training camps in Pakistan-administered Kashmir.

Lashkar-e-Taiba has attacked civilian and military targets in India, most notably the 2001 Indian Parliament attack and the 2008 Mumbai attacks. Its stated objective is to introduce an Islamic state in South Asia and to "liberate" Muslims residing in Indian Kashmir. The organization is banned as a terrorist organization by India, Pakistan, the United States, the United Kingdom, the European Union,Russia and Australia. Some experts such as former French investigating magistrate Jean-Louis Bruguière and New America Foundation president Steve Coll believe that Pakistan's main intelligence agency, the Inter-Services Intelligence (ISI), continues to give LeT intelligence help and protection.