To provide a double flowerpot which can exhibit a good heat- insulating property hardly affected by ambient air such as hot air or cold air, thereby improving the growth of a plant.

An outer container 2 is integrated with an inner container 3 in a state that the inner container 3 is received in the outer container 2. A circular space portion 51 is formed between the peripheral wall portion of the outer container 2 and the peripheral wall portion of the inner container 3, and the upper end of the circular space portion is closed. Projected support pieces 41 for hooking the upper ends of water-absorbing string-like articles 74 are projectedly disposed on the inner upper end side of the peripheral wall portion of the inner container 3.