To provide an arrangement structure for an optical information transfer transmitter-receiver capable of arranging an optical information transmitting transmitter-receiver performing an information transmission by optical communication can be arranged with precise optical axis conformity.

An automatic window surface cleaning device 1 comprises a cleaner 10 suspended and supported through a wire rope 30 suspended from a roof car 20 arranged on the roof of a building 2. The information transfer between the roof car 20 and the cleaning device 10 is performed by the optical communication between a roof car-side transceiver 31 and a cleaner-side transceiver 42. The roof car-side transceiver 41 is mounted on the end surface of the horizontal arm 23 of the roof car 20 vertically down, and the cleaner-side transceiver 42 is mounted on the side surface of a hanger 31 at the tip of the wire rope 30.