Connector and circuit board assembly

A connector for connecting a first circuit board having a first contact portion that is bendable and a second circuit board having a second contact portion that is bendable, the connector comprising:

• a first connector portion in which one or more projections project from a surface of a base plate;
• and
• a second connector portion formed of a fitting plate in which one or more fitting holes corresponding to the one or more projections are formed,
• wherein the first contact portion is formed on a surface of a first protruding piece protruding from the first circuit board and having insulation properties,
• wherein the second contact portion is formed on a surface of a second protruding piece protruding from the second circuit board and having insulation properties,
• wherein at least either the one or more projections or the one or more fitting holes have elasticity, and
• wherein when the one or more projections of the first connector portion are fitted in the one or more fitting holes of the second connector portion as catching the first contact portion of the first circuit board and the second contact portion of the second circuit board with the first and second contact portions facing and being overlapped on each other, one of a bottom surface of the first protruding piece and a bottom surface of the second protruding piece is in contact with the lateral surface of the one or more projections, while the other of the bottom surface of the first protruding piece and the bottom surface of the second protruding piece is in contact with the inner surface of the one or more fitting holes, the first contact portion of the first circuit board and the second contact portion of the second circuit board are elastically pressed against each other and contacted to each other to establish electrical connection therebetween in a space between a lateral surface of the one or more projections and an inner surface of the one or more fitting holes.