A lead wire holder including a first holding member and a second holding member. The first and second holding members are interconnected so that both can be folded and put together through a connecting portion. The holding members are provided on the inside thereof with opposed lead wire insertion recesses mounting legs for mounting the holder to a printed circuit board project downwardly from the lower end surface of either or both of the holding members. Elastic tongue portions for elastically holding lead wire are formed from a part of the wall portions of the lead wire insertion recesses. Narrow recesses are disposed on the lower end surface and extend from the insertion recesses, so that the insertion end of each lead wire is restricted when its coated end abuts against with the narrow portions. It is thereby possible to let downwardly projecting cores of the lead wires have a uniform projecting length.
