PROBLEM TO BE SOLVED: To provide a support structure of a flowerpot, which reduces a volume capacity when folding, enables use of the whole space in an expanded condition, and has large volume feeling. SOLUTION: This support structure 10 of the flowerpot is configured such that first end connection pieces 21a and 21b, second end connection pieces 23a and 23b, and an third end connection piece 25 are each fixed to the end places of external supports 13a-13d and an internal support 14 forming the support structure of the flowerpot, and the pieces are rotatably connected with first end coupling rods 31a-31d and second end coupling rods 33a and 33b, and in a similar way, first rear-end connection pieces 22a and 22b, second rear-end connection pieces 24a and 24b, and a third rear-end connection piece 26 are each fixed to the rear-end places of the external supports 13a-13d and the internal support 14, and the pieces are rotatably connected with first rear-end coupling rods 32a-32d and second rear-end coupling rods 34a and 34b. As a result of this, the whole support structure is folded in a bar shape by moving the opposite external supports 13a-13d to the reverse direction. COPYRIGHT: (C)2011,JPO&INPIT