The Amitāyurdhyāna Sūtra (Sanskrit; traditional Chinese: 佛說觀無量壽佛經) is a Mahayana sutra in Pure Land Buddhism, a branch of Mahāyāna Buddhism. It is one of the three principle Pure Land sutras along with the Infinite Life Sutra and the Amitabha Sutra. Amitāyus is another name for the buddha Amitābha, the preeminent figure in Pure Land Buddhism, and this sūtra focuses mainly on meditations involving complex visualization. This is reflected in the name of the sūtra, which translates to the "Amitāyus Meditation Sūtra."
It is considered by modern scholarship to be apocryphal of Chinese origin. The Sanskrit name and Sanskrit versions are thus reverse translations. According to Paul Williams, a more accurate Sanskrit title for this text would be Amitāyurbuddhānusmṛti Sūtra, meaning "Amitāyus Buddha-mindfulness Sūtra." No Sanskrit version of the sutra is known to exist.
The text begins with a story where a prince named Ajatashatru was enticed by the villain Devadatta to murder his father, King Bimbisara, in order to ascend the throne. Ajatashatru kills his father, and nearly kills his mother, Queen Vaidehi, but after advice from his other ministers, he relented and threw his mother in prison.
Lamenting her fate, Queen Vaidehi prays to Gautama Buddha for help, and he is able to visit her. Vaidehi expresses her wish to be born in Amitābha's pure land. Shakyamuni smiles, emitting light from his mouth, and goes on to tell Vaidehi how to be reborn in the Pure Land. The Buddha tells her that although she is in prison, she could still obtain liberation through the practices of Amitābha. The Buddha goes on to describe Amitābha and how one could obtain rebirth in his land of Sukhavati.