Abstract: Disclosed is a miniature portable memory device, comprising: a memory card unit; a shell, which is provided with a reception slot inside for receiving and accommodating said memory card unit, one end of said shell is provided with a first opening portion for insertion of said memory card unit into said reception slot, and a second opening portion is provided on said shell, so that when said memory card unit is inserted into said reception slot, said memory card unit is exposed to outside of said shell through said second opening portion; and a cover body, provided with a connection portion, that can be inserted into said first opening portion of said shell, and well fits therein.