A criminal concept concerning on document is that document is very important for evidence. A credit and a stability of document in legal aspect depends on its validity and its completeness. A legal equity for offences concerning document is not a property. So The Penal Code, B.E. 2499 has definited "document" in section 1 (7) with 4 qualifications.1 Document must be a declaration of intention.1 Document must be formality.1 Document must have a legal content.1 Document must indicate the producer. A scope of legal term on interpretation of criminal law for"document" must interpret both in its meaning and its objective. But it is the fact that sometime it is very hard to indicate what is document. So the opinion of lawyer and different reason must be used to fulfil the meaning of document and it can be said that sometime there is no decision of The Supreme Court to clear this problem. .Moreover the problems of document meaning appear in technological issue such as data of computer and its equipment’s that are Magnetic Card, Punched Cards, Punched Paper Tape, Diskette or Floppy Disk which can not indicate for the meaning of document as appear in the meaning of "document" in Penal Code, B. E. 2499 which can not apply to the said technological terms.
