Shivarahasya Purana (Sanskrit: शिव रहस्य पुराण; IAST: śiva rahasya purāṇa) is one of the 'Shaiva Upapuranas' or ancillary Purana regarding Shiva and Shaivite worship and is also considered 'Indian epic poetry' (Sanskrit: Itihāsa).
The book is dedicated to detailed explanation of Shaivite thoughts, rituals and religious myths. The manuscripts are found in various ancient literature. It is one of the first few works of the acclaimed Saint Ribhu, who was taught by Shiva himself.
The book consists of twelve parts and has about one hundred thousand verses. The Kannada translation of the book was published in 30 volumes in 1950.