Patent ID: 8346105

Claim:
An information storage device installed in a removable device configured to be removably installed in an image forming apparatus body, comprising: an information storage unit that stores information communicated between the image forming apparatus body and the removable device; a terminal that comes in contact with a body side terminal installed in the image forming apparatus body and communicates the information with the image forming apparatus body; and a substrate that holds the information storage unit and the terminal and includes a hole configured to be engaged with a protruding section installed in the image forming apparatus body, wherein the terminal includes a plurality of terminals each including one of a plurality of metallic plates arranged in a transverse direction thereof with a clearance therebetween, an earth terminal, which comes in contact with a body side earth terminal formed in the protruding section of the image forming apparatus body, is formed in the hole in the substrate, and the hole in the substrate is disposed at a position sandwiched between two metallic plates among the plurality of metallic plates.