A ferrule 10 includes a plurality of holding holes 16, a light incidence/emission plane 21 to pass light entering or emitted from optical fibers F2 respectively held at the plurality of holding holes 16, a plurality of lenses 31 disposed on an optical axes between the respective plural holding holes 16 and the light incidence/emission plane 21, and two or more guide portions to determine a relative position with a ferrule 10 on the other side. A second optical axis L2 between the light incidence/emission plane 21 and the ferrule 10 on the other side is inclined relative to a Z direction. A positional relation between the two or more guide portions is 180-degree rotationally symmetric around a reference axial line extending in the Z direction. A plurality of lenses 31 is disposed disproportionately in a direction opposite to an inclination direction of the second optical axis L2 from a position line-symmetric relative to a straight line crossing with the reference axial line and parallel to an X direction.
