The present invention instead of the water tank bottom corners right angle portion, and a strong, providing a difficult small portable tank scratched on the outside transparent plate. A both sides, the bottom, the main body frame 1 which is integrated with top surface by adhering the two plates aquarium constitute a front plate 2 is a transparent plate, the rear plate 3 to simplify the background as an opaque plate , so as to be U-shaped when viewed a bottom shape from the front, and without providing the right-angle portions of both corners as curves, and with a shock absorber that has protrusions on the plate surface 4 corners, space is provided in the carrying case and the transparent plates, an external damage from I prevent. .BACKGROUND【課題】水槽底面コーナー部が直角部でなく、丈夫で、外側透明板に傷がつきにくい携帯用小型水槽を提供する。【解決手段】両側面、底面、天面を一体化した本体枠1に2枚の板を接着して水槽を構成し、前面板2は透明板、背面板3は不透明板として背景を単純化し、底面形状を前面から見てU字型となるよう、両コーナーを曲線として直角部を設けず、板面4隅に突起した緩衝体をつけて、携帯ケースと透明板の間に空間を設け、外部からの損傷を防ぐ。【選択図】図1
