The invention relates to a structure of a shelf for aquarium, which makes the shelf for aquarium more practical. It is mainly composed of a plurality of plates and circular segments which are integrally formed. The front end of each circular segment is set in a plane shape, the bottom end is set in four adjacent circular segments with a gap, and the four gaps between the four circular segments form a concave space. u3002By means of the concave space, the embedded objects (e.g. water grass Basin, clay block) can be provided and positioned without sliding.The circular segment can be used to insert the combined support column to form a multi-layer frame. Therefore, the design can make the aquarium frame more practical.本創作係一種水族箱置物架之結構，乃使水族箱用之置物架得更佳實用功效；主要係：將架體設成由一體成型之複數板片、圓形管片所構成，該各圓形管片正面端設成平面狀，底面端則設成相鄰之四個圓形管片設成具有缺口，四個圓形管片之四缺口間形成凹陷空間。藉由凹陷空間得供嵌置物件（例如：水草盆體、陶土塊）、且可定位不滑動。藉由圓形管片可供插組合支撐柱，而得形成多層之架體組合一體；因此，藉由本創作可使水族箱置物架得更多方面實用功效。
