PURPOSE:To obtain a writing electrode head which enables a high resolution recording by projecting a part of a flexible printed wire board containing the tip of a slender conductor out from a support to contact with a recording paper. CONSTITUTION:A part of a flexible printed circuit board 25 with a stripe-shaped conductor 27 formed on an electrically insulating sheet 26 project out from a support 29 until the projected part 30 presses on the surface (an aluminum-deposited layer 22) of a spark-breaking recording paper 21. An electrical signal from an electrical signal source 28 is applied on the recording paper 21 and the stripe- shaped conductor 27 to move an electrode head.
