PURPOSE: A roadside tree planting box is provided to build an efficient hydrological cycle environment, to improve the processing efficiency of non-point pollutants, and to be able to accept the ground deformation after construction. CONSTITUTION: A main body (10) is open on the top, and formed with a planting and filtering space inside. A collecting chamber (20) is installed at a relatively lower position than the upper end of the main body within the planting and filtering space. A drain pipe (70) is attached to the collecting chamber, and drains the processed rainfall effluent to a collecting tub, etc. An attachment pipe (710) has a straight pipe (711) installed in the lower part of the collecting chamber, and an extension pipe (712) integrally formed at the end of the straight pipe. A cylindrical support stand (720) is adhered to an inner tube in which the straight pipe contacts with the extension pipe. An end of the support stand is inserted into a cylindrical connector (730). A binding member (740) is closely adhered to the internal periphery of the extension pipe in the outer periphery so as to enable to adjust the angle, and has a fastening projection (741) on the internal periphery of one end. A coupling pipe (750) has a fastening groove (752) on the outer periphery, and a fastening part (751) in which a connector is inserted on the inner periphery.본 발명은 도로의 수목 공간을 활용하여 물순환 환경을 구축함과 아울러 식재된 수목에 대한 충분한 수분공급이 이루어지도록 하고, 강우유출수로부터 비점오염원 처리능을 극대화 시킴은 물론, 집수정의 기 설치된 위치에 구애받지 않고 자유로운 체결이 가능하고, 시공 후 지반변형에 의한 물순환라인의 파괴를 방지할 수 있는 가로수목 식재박스에 관한 것이다.
