A connector includes a required number of contacts of three kinds and a housing having inserting holes for these contacts. One set of three contacts or contacts A, B and C are inserted into the same inserting hole of the housing. The contact A is inserted into the inserting hole from the side of a fitting opening of the housing, while the contact B and the contact C are inserted in parallel with each other into the inserting hole from the opposite side of the fitting opening such that the contact A and the contact C are aligned with each other and the contact A and the contact B are arranged to be staggered relative to each other, thereby bringing a flexible printed circuit board into contact with the contacts A and contacts B upon insertion of the circuit board. With this construction, narrow pitches less than 0.25 mm can be obtained, and high density can also be achieved.