To provide a small goal post for a ball game which is assembled and folded quickly and easily, has a sufficient strength against ball impact, and has excellent durability.

The lower ends of posts of a gantry type frame 10 of substantially U-shape which is formed by connecting a right post 12 and a left post 13 at both ends of an upper cross member 11, and the front ends of bottom members of a bottom frame 15 of substantially U-shape which is formed by connecting a right bottom member 17 and a left bottom member 18 at both ends of a lower cross member 16, are turnably connected through turning shafts 20 to compose a foldable frame 2 folded between a raised state in which the gantry type frame 10 is raised relative to the bottom frame 15 and a folded state in which the gantry type frame 10 and the bottom frame 15 come close to each other. The goal post includes connection rods 4 removably connected to the upper parts of the gantry type frame 10 and the back parts of the bottom frame 15 at both ends, respectively, and diagonally connected between the gantry type frame 10 and the bottom frame 15 in the raised state of the gantry type frame 10, and holding the gantry type frame 10 in the raised state.