(Ibn al-Ṣalāḥ's) Introduction to the Science of Hadith (Arabic: مقدمة ابن الصلاح في علوم الحديث, romanized: Muqaddimah ibn al-Ṣalāḥ fī ‘Ulūm al-Ḥadīth) is a 13th-century book written by `Abd al-Raḥmān ibn `Uthmān al-Shahrazūrī, better known as Ibn al-Ṣalāḥ, which describes the Islamic discipline of the science of hadith, its terminology and the principles of biographical evaluation. A hadith is a recorded statement, action or approval of the Islamic prophet Muhammad which serves as the second source of legislature in Islamic law. The science of hadith that this work describes contains the principles with which a hadith specialist evaluates the authenticity of individual narrations.

The Introduction comprises 65 chapters, each covering a hadith related issue. The first 33 chapters describe the various technical terms of hadith terminology which describe the conditions of a hadith's authenticity, or acceptability as a basis for Islamic jurisprudence. The following chapters relate to the isnād, or chain of narration^{[broken anchor]}. Next are a series of chapters pertaining to the etiquette to be observed by hadith scholars and manners of transcription. The last chapters describe various issues relating to the narrators of hadith including naming conventions.

Ibn al-Ṣalāḥ began the Introduction as a series of lectures he dictated to his students in Damascus ending in 1233. It has received considerable attention from subsequent authors who explained, abridged and set it to poetry and it became an example for latter books of its genre. The Introduction has been published a number of times in its original Arabic and has also been translated into English.

As the Introduction was not officially named by the author, there exists some speculation as to its actual title, with different possibilities suggested. al-Dhahabī referred to it as `Ulūm al-Ḥadīth, The Sciences of Hadith, as did Ibn Ḥajr and Muḥammad ibn Ja`far al-Kattānī.

`Āʼishah bint `Abd al-Raḥmān said in the foreword of her edition of the Introduction:

His book about the sciences of hadith is the best known of his works without comparison, to the extent that it is sufficient to say, the Book of Ibn al-Ṣalāḥ, the intent being understood due to its popularity and stature. With the previous scholars, its subject matter overcame it, thus being referred to as, the Book of Ibn al-Ṣalāḥ about `Ulūm al-Ḥadīth or as he referred to it in its opening pages, the Book of Familiarity with the Types of `Ulūm al-Ḥadīth. It has become well known as of late as: Muqaddimah Ibn al-Ṣalāḥ fi `Ulūm al-Ḥadīth, Ibn al-Ṣalāḥ's Introduction to the Sciences of Hadith.

Nūr al-Dīn `Itr, in the introduction to his edition of the Introduction, concluded that its actual name is either ʻUlūm al-Ḥadīth (The Sciences of Hadith) or Ma`rifah Anwā`i `Ilm al-Ḥadīth (Familiarity with the Types of the Science of Hadith). This is based upon the author's own usage in his own introduction in addition to the usage of other scholars in the centuries after the authoring of the book. Similar to Bint `Abd al-Raḥmān, he acknowledged that the book is most commonly referred to as Muqaddimah Ibn al-Ṣalāḥ (The Introduction of Ibn al-Ṣalāḥ).

al-`Irāqī described the Introduction as "the best book authored by a hadith specialist in defining its terminology."