The present invention relates to a finger joint for preventing separation, and more specifically, to a finger joint for preventing separation, which forms a mounting groove and a fixing groove on an upper portion and a lower portion of first and second finger joints installed in an upper plate slab, allows a coupling unit of a coupling member to adhere to the mounting groove to prevent a coupling protrusion coupled to the fixing groove from being separated to the outside, wherein the coupling member can prevent car accidents caused by a damage to a vehicle wheel by lifting one of the first and second finger joints to an upper portion of the upper plate slab by loosing a nut fixing the first and second finger joint installed in the upper plate slab or cutting an anchor bolt in advance.
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