The Longer Sukhāvatīvyūha Sūtra (Sanskrit), simplified Chinese: 佛说无量壽經; traditional Chinese: 佛說無量壽經; pinyin: Fóshuōwúliàngshòujīng; Vietnamese: Phật Thuyết Kinh Vô Lượng Thọ; Japanese: Taisho Tripitaka # 360) is one of the two Indian Mahayana sutras which describe the pure land of Amitābha. Together with the Shorter Sukhāvatīvyūha Sūtra, this text is highly influential in China and Japan where it is revered by the Jōdo-shū and Jōdo Shinshū congregations. The title is often translated in English as either the Sutra [on the Buddha] of Immeasurable Life, or simply the Immeasurable Life Sutra.

The Mahāyāna sūtras are a broad genre of Buddhist scripture (sūtra) that are accepted as canonical and as buddhavacana in Mahāyāna Buddhism. They are largely preserved in Sanskrit manuscripts, and translations in the Tibetan Buddhist canon and Chinese Buddhist canon. Several hundred Mahāyāna sūtras survive in Sanskrit, or in Chinese and Tibetan translations. They are also sometimes called Vaipulya ("extensive") sūtras by earlier sources. The Buddhist scholar Asaṅga classified the Mahāyāna sūtras as part of the Bodhisattva Piṭaka, a collection of texts meant for bodhisattvas.