The present invention with a simple mechanism, to provide a cleaning device of the aquarium that the whole bottom can be cleaned up to the corners of the side wall surface and the bottom of the front and rear direction of the aquarium. A tank cleaning device 10 includes a cleaning brush section 20 was a long stretch in the lateral direction of the tank in order to clean the bottom 3 of the water tank 1, support for supporting in a direction substantially perpendicular to the cleaning brush portion in the longitudinal direction comprises a shaft 11, a shaft moving means 30 comprising a wire 31 to pull the cleaning brush unit is connected to a predetermined position of the support shaft upper portion to move back and forth direction of the water bath. Further, at a position projecting towards the water tank 1 from the position or the vertical line of the at least one side wall surface 2 normal of the front and rear of the tub, and, at the upper position than a predetermined position of the support shaft to move in a shaft moving means, the stopper device 40 in which the support shaft strikes, I provided.BACKGROUND.【課題】簡単な機構で、水槽の前後方向の側壁面と底面との隅部までの全底面を清掃できる水槽の清掃装置を提供する。【解決手段】水槽の清掃装置10は、水槽1の底面3を清掃するべく水槽の左右方向に長く延伸した清掃ブラシ部20と、清掃ブラシ部をその長手方向にほぼ直交する方向で支持する支持シャフト11と、清掃ブラシ部を水槽の前後方向へ移動するために支持シャフト上部の所定位置に連結して引っ張るワイヤ31からなるシャフト移動手段30と、を備える。また、水槽の前後の少なくとも一方の側壁面2の垂線の位置又は垂線より水槽1の方へ突出した位置で、かつ、シャフト移動手段で移動するための支持シャフトの所定位置より上方の位置で、支持シャフトが突き当たるストッパ装置40を、備える。【選択図】図1
