Different material joining method

A different material joining method in which a first joining member having a plate shape and a second joining member having a plate shape are sandwiched with facing electrodes and undergo pressure application and energization, and the first joining member and the second joining member are joined in a first joint part of the first joining member and a second joint part of the second joining member, the second joining member being lower in melting point than the first joining member, the different material joining method comprising:

• forming a discontinuous abutting part in either one or both of the joint first part and the second joint part, both the first joining member and the second joining member abutting onto the discontinuous abutting part in a discontinuous state;
• melting the second joining member by sandwiching the first joint part and the second joint part with the electrodes and performing the pressure application and the energization on the either one or both of the first joint part and the second joint part in a state where the first joining member and the second joining member are caused to abut onto each other in the either one or both of the first joint part and the second joint part while the discontinuous abutting part is included;
• and
• welding both the first joining member and the second joining member by bringing a melting material of the second joining member into interface joining with a surface of the first joining member toward the second joining member.