Increasing use is being made of various types of scientific evidence in court. The general requirement for the admissibility of such evidence is relevance. Although expert evidence is considered to be opinion evidence, it is admissible if it can assist the court to decide a fact in issue; provided that it is also reliable. This term paper is studied the opinions of fingerprint expert in evidence act. In evidence Act, when the court has to form an opinion upon a point of foreign law, or of science, or art, or as to identity of hand writing or finger impressions, the opinion upon that point of persons specially skilled in such foreign law, science or art, or in question as to identity of handwriting or finger impressions are relevant facts. The reason as well as opinion given by a fingerprint expert as to the identity of a palm impression is admissible in evidence. The evidence given by a fingerprint expert need not necessarily be corroborate but the court must satisfy itself as to the value of the evidence of expert in the same way as it must satisfy of the value of other evidence. The chief advantages of fingerprinting are practical: it is cheaper and faster than anthropometry, and, crucially, the recording of data and the taking of inked finger impressions (required only minimal training).