A lead wire connection structure comprising: a metal plate ; a lead wire connected to a front surface of the metal plate ; and a pair of holding protrusions protruding from the front surface of the metal plate , and sandwich at least two parts of the lead wire to dispose the lead wire at a fixed position, each of the pair of holding protrusions sandwiching respective one of the two parts of the lead wire , wherein the each of the holding protrusions has a holding gap therein to sandwich and hold the lead wire press-fitted in the holding gap , a connection space of the lead wire and the metal plate is provided between the pair of holding protrusions , the lead wire is held on the front surface of the metal plate by the pair of holding protrusions , and the lead wire is connected to the front surface of the metal plate in the connection space , and, the lead wire connection structure further comprising: a holding body fixed to a back surface of the metal plate , wherein the holding body has the pair of holding protrusions , and the holding body is fixed to the metal plate to dispose the holding protrusion on the front surface of the metal plate , and, characterized in that , the holding body is a resin-molded body placed and fixed on the back surface of the metal plate , the resin-molded body includes the pair of holding protrusions unitarily formed, the metal plate has a through-hole (1a 1b) therein, the holding protrusions passing through the through-hole (1a 1b) and protruding from the metal plate , and the holding protrusions pass through the metal plate , the holding protrusions protruding from the front surface of the metal plate . a metal plate ; a lead wire connected to a front surface of the metal plate ; and a pair of holding protrusions protruding from the front surface of the metal plate , and sandwich at least two parts of the lead wire to dispose the lead wire at a fixed position, each of the pair of holding protrusions sandwiching respective one of the two parts of the lead wire , wherein the each of the holding protrusions has a holding gap therein to sandwich and hold the lead wire press-fitted in the holding gap , a connection space of the lead wire and the metal plate is provided between the pair of holding protrusions , the lead wire is held on the front surface of the metal plate by the pair of holding protrusions , and the lead wire is connected to the front surface of the metal plate in the connection space , and, a holding body fixed to a back surface of the metal plate , wherein the holding body has the pair of holding protrusions , and the holding body is fixed to the metal plate to dispose the holding protrusion on the front surface of the metal plate , and, characterized in that , the holding body is a resin-molded body placed and fixed on the back surface of the metal plate , the resin-molded body includes the pair of holding protrusions unitarily formed, the metal plate has a through-hole (1a 1b) therein, the holding protrusions passing through the through-hole (1a 1b) and protruding from the metal plate , and the holding protrusions pass through the metal plate , the holding protrusions protruding from the front surface of the metal plate . <EOS>