A medium convey apparatus including: a convey mechanism including an endless belt having a medium-placed face; and a first adsorbing mechanism which includes first and second electrodes each facing a face of the convey mechanism opposite to the medium-placed face, and which adsorbs a recording medium to the medium-placed face by applying a specific voltage to between the first and second electrodes; wherein a surface layer member covers the first and second electrodes; and wherein at least one of the endless belt and the surface layer member has at least an area facing the first and second electrodes, wherein the area is formed of a resin material containing an ion conductive resistivity control material, and wherein a volume resistivity of the resin material ranges from 1010 to 1014 Ω·cm when the specific voltage is applied in an environment at a temperature of 22.5° C. and a relative humidity of 50%.