PURPOSE: A joint apparatus for a pile is provided to uniformly distribute hammering force when upper and lower piles are connected to each other using an annular ring. CONSTITUTION: A joint apparatus for a pile comprises an upper pile(40), a lower pile(50), a joint, and an annular ring(70). The upper pile has a relatively smaller size than the lower pile. The joint connects the upper pile and the lower pile. The joint comprises an upper disk plate(61), a lower disk plate(65), a middle disk plate(62), pipes, multiple first and second reinforcing plates(64,64'), and a first joint(60). The annular ring is fixed to the circumference of the joint. The joint and the annular ring are formed to correspond to the diameter of the lower pile.
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