The subject of the Research addresses a study on confession and its effect on criminal evidence in light of the provisions of Criminal Proceedings Law. A main question was asked with regards to the problem contemplated in the Research which centers on finding out and displaying the authoritative effect of the confession of the accused person in criminal evidence as per the said law. The Researcher has relied on analytical and descriptive methodology in resolving the problem whereas he demonstrates in the Research the nature of confession, its importance and validity conditions, and not subjecting the accused to any kind of coercion that may affect the validity of the his confession or will. The study also clarifies the validity of confession and its effect in criminal evidence as well as clarifying the authority of court in dividing the confession or not taking it into account. The study has reached various results with a number of recommendations that serve the purpose of the research.