A terminal of the present disclosure is to be connected to a mating terminal and includes a tube portion and a wire connecting portion provided on a rear end part of the tube portion. A resilient contact piece is provided inside the tube portion. The resilient contact piece presses the mating terminal inserted from front of the tube portion toward an inner wall of the tube portion. An upper inspection opening and a lower inspection opening are formed in side walls of the tube portion. The upper inspection opening is formed on an upper side. The lower inspection opening is formed on a lower side (other side). The resilient contact piece is partially exposed from the upper and lower inspection openings with an optical path of light entering from either one of the upper or lower inspection opening and coming out from the other secured.