A connector includes contact conductors each having two contact portions and a conductor connecting the two contact portions arranged on a flexible printed circuit board folded back so that the contact portions arranged its front and rear faces can be connected to contacts of connecting objects, pushing device provided on the circuit board, and an elastic member arranged between the contact portions on the front and rear faces. Another connector includes a flexible printed circuit board not being folded back, an elastic member held on the side of the circuit board opposite from the contact portions, and at least one pushing member for pushing the circuit board and the connecting objects. A pushing jig includes pushing portions provided on a base material to be pushed against connecting objects, an elastic member held on the base material opposite side of the pushing portions, and at least one pushing member for pushing the base material and the connecting objects. With these constructions, a reduced overall distance between the substrates is possible, and a narrower pitch and stable connection can be obtained.