A thin connector comprises a first connector having a flat plate shape and a second connector having a flat plate shape superimposed on and fitted with each other, the first connector including first contacts arrayed in a direction, each first contact having a spring portion composed of a first metal member in a flat plate shape, a projection portion formed on the spring portion so as to protrude in a perpendicular direction to the plane of the first metal member, and a first contact portion formed on a side surface of the projection portion, the second connector including second contacts arrayed in a same direction as the direction in which the first contacts are arrayed, each second contact being composed of a second metal member in a flat plate shape and having a second contact portion formed on a side surface of the second metal member.