An aligned structure of cables includes: a plurality of cables each including a conductive cable core, an insulator covering an outer periphery of the cable core, and a cable core exposed portion, in which the cable core is exposed, on a side of a distal end of the cable a first cable core aligning insulator including a plurality of grooves into which the cable core exposed portions of the cables are respectively fitted and which align the cable cores and a cable core fixing insulator which fixes the cable core exposed portions aligned by the first cable core aligning insulator, wherein cross sections of the cable cores are exposed on a surface on a side of distal ends of the cable cores of the cable core fixing insulator, and a pitch of the cross sections is shorter than a pitch of the cables.
