To provide: a conductive material precursor allowing manufacture of a conductive material having high conductivity even in an ultrafine line pattern; and a conductive material excellent in conductivity.

Provided is a conductive material precursor having, on a transparent support, at least a physical development nucleus layer and a silver halide emulsion layer in this order. On the silver halide emulsion layer, an upper layer is disposed which contains a polymer having a functional group represented by the general formula I or the general formula III. Also provided is a conductive material manufactured using the conductive material precursor.