The Chandogya Upanishad (छान्दोग्योपनिषद्) is an ancient and extensive Upanishad of the Samaveda. The preface to this Gita Press edition places it within the Talavakara Brahmana of the Samaveda, the same branch as the Kena Upanishad, which is why the two share a peace invocation. Its eight chapters set out spiritual knowledge together with the meditations and rites connected with it.

Famous passages include the meditation on Om as the udgitha, the Shandilya vidya, the stories of Satyakama Jabala and Raikva, the doctrine of the five fires, Uddalaka Aruni's teaching 'tat tvam asi' to his son Shvetaketu, the dialogue of Sanatkumara and Narada on the infinite (bhuma), the meditation on the small space in the heart, and the tale of Indra and Virochana learning about the Self from Prajapati. Many of the Brahma Sutras rest on these passages.

This is volume three of the Gita Press, Gorakhpur Upanishad-bhashya series (book code 582), giving the text, Shankara's commentary and a Hindi translation of both. Its imprint records 32,000 copies printed between Samvat 1993 and 2050 and an eighth edition of 5,000 in Samvat 2052. It has 978 pages.