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It is defined that digital evidence is all valuable information as evidence that is preserved and delivered in digital form, the salient traits of its character is independent from a storage, invisible, unreadable etc., it must be solved authenticity, reliability, best evidence for the purpose of its admissibility. In our criminal procedure law, the evidence is classified into two types, statements and objects, objects as evidence are composed of documents and things, it could be included statements by a person or not in documents as evidence. In essence digital evidence is regarded as documents evidence so hearsay-rule is applicable to it. To acquire admissibility of digital evidence made by a person it is important that the person acknowledges his digitals documents produced by him-self according to the criminal procedure law art. 313① in a court but the opinion that only the acknowledgement by a writer can give admissibility of digital evidence is very dangerous in criminal procedure because it may make valuable evidences useless things. In the revised criminal procedure law new solution is imposed in it. Even though a person deny its contents in a report said by him-self for example “I didn’t talk like that in a report”, prosecutor could prove that a report made by a investigator is credible and exact in the objective way including recording video-tape etc., the admissibility of a report evidence can be achieved recognition. This revised purpose must be regraded as a new basis in evidence law totally, even if a person deny his digital document made by him-self for example “I didn't make digital document like that”, prosecutor could prove that a digital document is made by him-self in the objective way including analysis meta-data etc., “it is you who made this digital document”, the admissibility of a digital document evidence could be achieved recognition. if to prove who made a digital document evidence end in failure, its admissibility have to be reviewed again according to criminal procedure law art. 315, valuable digital evidence must not go into the dumper easily. Anyone talking about evidence in criminal procedure cannot help but mention digital information that is essential in it by progress of scientific technology. Much to our regret, there is not at all rule for the purpose of admissibility of digital evidence in present criminal procedure law, as a result many opinions and judicial decisions consider requisites of admissibility of digital document as one of admissibility of non-digital document but an intrinsic attribute of digital evidence is profoundly different from one of traditional evidence. Ultimately I think that criminal procedure law must be revised referring to foreign country’ law to acquire admissibility of digital evidence although a person deny a digital document that is made by him-self, if prosecutor could be successful in pr○○f, “it is written by him-self”, in other words witness or suspect, the digital evidence shall be useful. I wish to be collected g○○d thoughts to prevent that valuable digital evidence may be discharged by only one statement of a wicked-person.