To provide a means for preventing the generation of any unnecessary electric wave due to a metallic exterior such as a card type memory, and for mounting a recording means such as a memory and an image forming device having the means, OA equipment such as a scanner, and recording means using equipment such as a personal computer.

This recording means using equipment is provided with an earth plate 13 to be conducted with a recording means 51 when the recording means 51 is mounted on a substrate 11 for earthing the recording means 51 by the substrate 11, a mounting structure 10 of the recording means having the earth plate 13, the substrate 11 engaged with the earth plate 13, and a mounting means 12 integrally formed with the substrate 11 to be engaged with the recording means 51 for mounting the recording means 51 on the substrate 11, and a recording means 51 to be made available in a state that the recording means 51 is conducted with the earth plate 13.