A ferrule of the invention includes: a ferrule main body having a front edge and a rear edge; a fiber insertion hole into which an optical fiber is to be inserted; a recess provided at a top surface of the ferrule main body, having a reflection surface converting an optical path of a front end of the optical fiber into an optical path of a light emission-launch end provided at a lower surface side of the ferrule main body; a light emission-launch portion provided on the optical path of the light emission-launch end at a lower surface of the ferrule main body; a locating pin provided closer to the front edge than the light emission-launch portion at the lower surface of the ferrule main body; and a recessed portion provided between the locating pin at the lower surface of the ferrule main body and the light emission-launch portion.