ELECTRONIC PEN

PURPOSE: The electronic pen suppresses the generation of the cause of disrupting signal process and enlargement dimension. CONSTITUTION: A housing (10) includes an opening part (12) and a guide groove guiding a pen shaft inserted from the opening part. A maintenance unit is fixed to the housing and maintains the pen shaft inserted to the guide groove. A first circuit substrate (30) fixed in a opposite position, the guide groove being between them, and a photographing apparatus is set up in one face of the substrate. The photographing apparatus takes a picture of light of an emitting portion reflected from an object. A part of the guide groove, a part fixing the maintenance unit, and a part fixing the first circuit substrate are comprised a single member.