Research: This research is titled: (Introduction to the Theory of Proof in Law) aimed at clarifying the general approach of the Saudi legislator regarding proof through its regulatory texts contained in the Saudi Law of Proof issued by Royal Decree No. (M/43) for the year 1443. This research thus studies the general theory of proof, indicating what the Saudi legislator has adopted, making this study a foundation that outlines the general framework of the provisions of this subject and its limits...