Optical connector cleaning tool and optical connector cleaning tool attachment

An optical connector cleaning tool comprising

• a fitting portion configured to be fitted in a hole defined by a connection component, on one end side of which a compact dual core optical connector having two ferrules in a housing is fitted and on the other end side of which the hole is formed such that connection end faces of distal ends of the two ferrules are exposed in the hole, and
• a cleaning medium projecting from the fitting portion to contact the connection end face of one of the two ferrules,
• wherein the fitting portion is formed in a shape that allows the fitting portion to be fitted in the hole in a first posture and a second posture, the fist posture and the second posture being postures rotated 180° from each other around the center of a virtual straight line connecting the centers of the two ferrules when viewed from an axial direction of the two ferrules, and
• the cleaning medium contacts one of the two ferrules in a state in which the fitting portion is fitted in the hole in the first posture and contacts the other of the two ferrules in a state in which the fitting portion is fitted in the hole in the second posture,
• the fitting portion is formed in a shape that allows the fitting portion to be accommodated in the hole in an entire range in a direction along which the two ferrules are aligned, and
• a half of the fitting portion in the direction along which the two ferrules are aligned includes the cleaning medium that projects, and the other half of the fitting portion in the direction along which the two ferrules are aligned is formed in a shape that allows the fitting portion to be fitted in an adapter that is configured to connect a single core optical connector different from the compact dual core optical connector.