PROBLEM TO BE SOLVED: To prevent the falling down of the growing material of a planting container by covering the gaps between the planting containers, and also to prevent the separation of the containers installed as a row. SOLUTION: This planting facility is provided by: installing the planting containers 100 having side walls 102 and bottom plate 101, forming horizontal pieces 105 protruding from in the vicinity of an upper end of the side walls 102 to outer direction along the side walls 102, and installing joining holes 108 at the inside of the side walls 102 at the position of the notched parts 109 of the horizontal pieces 105 as a row; inserting the side pieces 110b, 110b to the upper end openings 108b, 108b of the joining holes 108, 108 arranged as nipping the approaching side walls 102, 102 for mounting a joining member 110 having a cross sectional view of U shape to join the planting containers 100, 100 with each other; and also mantling the the horizontal piece 105 of one of the planting containers 100 on the upper end of the side wall 102 of the other planting container 100. COPYRIGHT: (C)2007,JPO&INPIT