PROBLEM TO BE SOLVED: To appropriately align lead wires used in a medical device such as an electrocardiograph.SOLUTION: A lead wire aligning instrument includes: a housing 10 provided with through-holes 13, 14 and 15 for making lead wires pass through and a friction imparting means provided in the through-holes 13, 14 and 15, for giving friction at a part of the through-holes when the lead wires move inside the through-holes 13, 14 and 15.COPYRIGHT: (C)2013,JPO&INPIT【課題】心電計等の医療機器のリード線を整列する。【解決手段】リード線を透通させる透通孔13、14、15を有する筐体10と、前記透通孔13、14、15に設けられ、前記リード線が透通孔13、14、15内を移動する際に透通孔の一部において摩擦を与える摩擦付与手段とを具備する。【選択図】図1