[Problem] An object of the present invention is to provide: a planter bottom member that enables improvement in durability by suppressing decay or occurrence of mold or the like on the side wall lower end side of a planter having a wooden side wall and a planter using the bottom member and having excellent durability.[Solution] A bottom member 2 is attached to a side wall member 1 formed of a wood material and having a cylindrical shape opened at upper and lower sides. The bottom member 2 includes: a lower surface cover portion 3 formed of a synthetic resin, having a ring shape in plan view, and having lower end receiving portions 32 for receiving a lower end surface of the side wall member 1 an outer wall cover portion 4 formed continuously to the lower surface cover portion 3 and provided so as to cover an outer circumferential surface of a lower end portion of the side wall member 1 and a bottom portion 5 formed continuously inward from the lower surface cover portion 3 and having a draining hole. The lower end opening of the side wall member 1 is closed by the bottom portion 5, the lower surface of the side wall member 1 is covered by the lower surface cover portion 3, and the lower end outer circumference of the side wall member 1 is covered by the outer wall cover portion.