Ferrule part and optical communications module

The ferrule part 16 comprises ferrule 60 , first and second optical fibers 62 and 64 , and optical filter 68 . Ferrule 60 has first and second end surface 60 a and 60 b , ferrule insertion hole 60 c , and groove 68 . Ferrule insertion hole 60 c extends along a first axis, and accommodates first and second optical fibers 62 and 64 . Groove 66 extends along a second axis crossing the first axis, and extends so as to extend across ferrule 60 . Groove 66 is provided along a plane defined by the second axis and a third axis perpendicular to the first and second axes. Optical filter 68 can reflect a part of light incident on one surface 68 b of the pair of surfaces of optical filter 68 , and can transmit a part of the light incident on other surface 68 a.